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B F W [ ^ a c e f f f e d a ^ [ X T P M I &H E A ? < ; : : : ; = ? B E I M P T X j m q s v w x x x w u s p m i e b ^ Z &[ X T Q O M L L L M N P S V Z ^ b e i { ~             | x t q m &m i f c a _ ^ ^ ^ _ a c f i m q t x {                    & | x v s r q q q r t v y |                         &                                      &                                      &                                      &                                      &                                      &                                   ! ! ! &! !                                  " " " & " " "                      $ & ( * * * * ( ' $ !  ! ! &! ! !                  " & ) - 0 2 4 6 6 6 6 4 2 0 - ) % ! &#                   * - 1 5 8 < > A B C C C B @ > ; 8 4 0 &3 / , ( % !            # ' 4 8 ; ? B F I L N O P P P O M J G D @ &> : 7 3 0 , ) ' % $ $ $ % & ( + . 2 6 D H K O R V Y [ ] ^ ^ ^ ] \ Z W T P L &O K H D A = : 7 5 3 2 2 2 3 5 7 : = A O S V Z ] a d g i k l l l k i g d a ] &[ W T Q M I F D B @ @ @ @ B D F I M Q ` d g j n r u w y { { { { y w u r n j &l h e a ] Y V S Q P O O O P R T W [ ^ m q t x |             ~ { &{ w t p l h e b ` _ ^ ^ ^ _ a c f j m |                   &    | x u r p n m m m n p r u x |                    &        } { { { { }                         &                                      &                                      &                                      &                                      &                                      &                                      &                                      &                                      &                                      &                      ! $ & ( ( ( ( ' % "       &                    $ ' + . 1 3 4 5 5 5 4 2 / , ) % !   &                  $ 0 4 7 : = ? A A A A @ > ; 8 5 1 - * & &% !             # & * - 1 > B E H K M N N N M L J G D @ = 9 6 2 &3 0 , ) & $ # " " " # % ( + . 2 6 9 = J M Q T W Y Z [ [ [ Z X U R O K G D @ &? ; 8 5 2 0 / / / 0 1 3 6 9 = @ D G K X \ _ b e g h h h g f d a ^ Z W S P L &M I F C @ > < < < < = ? B E H L P S W c g j m p r t t t t s q n k h d ` ] Y &Y U R O L J H H H H I K N Q T X \ _ c o s v y | ~      } z w t p l i e &g c _ \ Y W U T T T U V Y \ _ b f j m y }              ~ z v s &r o k h e c a ` ` ` a c e h k o s v z                   } &} y v r p m l k k k l n p s v z ~                      &   ~ { x v u u u u w y |                         &       ~ ~ ~ ~                            &                                      &                                      &                                      &                                      &                                      &                                      &                                      &                                      &                           ! ! !         &                       # & ) + - . . . - + ) & #    &                   " % ) , 0 3 5 7 9 9 9 9 7 5 3 0 , ( $ &#                  # / 3 7 ; > A C E F F F E C A > ; 7 3 / &1 . * & "           " & ) - 8 ; ? C G J L N P P P P N L J G C @ < &: 7 3 / , ) ' % $ $ $ % ' ) , / 3 7 : D H L P S V X Z [ [ [ Z X V S P L H D &D A = 9 6 3 1 / . . . / 1 3 6 9 = A D M Q U Y \ _ a c d d d c a _ \ Y U Q M &O L H D @ = ; 9 7 7 7 7 9 ; = @ D G K V Y ] a e h j l n n n n l j h e a ^ Z &X U Q M J G E C B B B C E G J M Q U X e i m q t w y { | | | { y w t q m i e &f c _ [ X U R Q O O O O Q S U Y \ ` d r u y }             | x t &s p l h e b ` ^ ] ] ] ^ ` b e h l p s                    &  | x u r o m l l l l n p s v y }                     &       } | | | | ~                          &                                      &                                      &                                      &                                      &                                      &                                      &                        " % ' ( ( ( ( & $ !     &                    " & * - 0 3 4 6 6 6 6 4 2 0 , ) % ! &!                   , / 3 6 : = ? A C C C C A ? = 9 6 2 . &- * & "            " & * - 9 = A E H K M O P P P O M K H E A = 9 &9 6 3 / + ( & $ # # # $ % ' * - 1 5 9 R U X \ ` c e g h h h g f d a ^ Z V R &R O K G D A ? = < < < = ? A D G K O R n r v z }          } z v r n &n k g c ` ] [ Y X X X Y [ ] ` c g k n                    &     | z x w w w x z |                         &                                      &                                      &                      " % ( * , - - - , * ( % "    &                   : > B F I L N P Q Q Q P N L I F B > : &: 7 3 / , ) ' % $ $ $ % ' ) , / 3 7 : ^ b f j m p r t u u u t r p m j f b ^ &^ [ W S P M K I H H H I K M P S W [ ^                    &  { w t q o m l l l m o q t w {                      &                                      &                                      &                                      &                   ! % ) - 0 3 5 7 8 8 8 7 5 3 0 - ) % ! &!                  ! ; ? C G J M O P Q Q Q P N L I E B > ; &< 9 5 1 . + ( & % % % & ' ) , / 3 6 : N Q U Y \ _ b d e e e d c a ^ [ W T P &O L H D A > < : 9 9 9 : < > A D H L O g k o s v y { } ~ ~ ~ } { y v s o k g &g d a ] Y V T R Q Q Q R S U X [ _ c g                    & } y v r o m k j j j k l n q t x |                     &                                      &                                      &                                      &                         ! # $ $ $ # "       &                   , / 3 6 : = ? A B B B A @ > ; 8 4 0 , &, ) % !            ! % ) , I M Q U X [ ] _ ` ` ` _ ] [ X U Q M I &I F B > ; 8 6 4 3 3 3 4 6 8 ; > B F I f j n r u x z | } } } | z x u r n j f &f c _ [ X U S Q P P P Q S U X [ _ c f                    & } y u r o m l k k k l n p s w z ~                     &                                      &                                      &                                      &                                      &                                      &                                      &                                      &                        " # # # "          &                    # & ) + - . . . - + ) & #      &                  ! , 0 3 5 7 9 9 9 9 7 5 3 0 , ) % "   &               ! $ ( , 7 ; > @ B D D D D B @ > ; 7" 4$ 0$ -$ )$ %" &'# #!            # ' * . 1 5 @ D G J L N O O O N L J G# D% @' =( 9( 6( 2' &/& ,$ )! & $ # # # # % ' * - 0 4 8 ; ? C M P S V X Y Y Y Y W! U$ R' O* L, H- D- A- =- 9+ &:, 7* 4' 1$ /! - - - - . 0 3 6 9 = A D H L U X [ ^ ` b b b b a$ _' \* Y- V/ R1 N1 K1 G1 C0 &D0 A. >, ;) 8& 7" 6 6 6 7 9 ; > A E I L P T \ _ b e h i j j j" i& g) e, b/ _2 [3 W4 T4 P4 L3 &J2 G0 D- A* ?' ># > > > @ B E H K O S V Z ^ d g j m o p p p# p' n+ l. i1 f4 c6 _7 [7 X7 T7 P5 &O4 K2 I/ F, E( D$ D! D E G I L O S W Z ^ b e j n p s t u! u$ u( t, r/ p3 m5 j8 f9 b: _: [: W9 T7 &X9 U8 Q6 N3 L0 J, I( I$ I! J K M P S W [ _ b f i l p s u w x! x% x( w, v/ t3 q6 n8 j: f; b; _; [: &X9 U7 R4 O1 M. L* L& L# L N P S V Y ] a d h l n q t w y z! z% z( z, x0 v3 s6 p9 m; i< e< b< ^< Z: &* ( & $ $ $ $ & ( * - 1 5 8 < ? C G J L N P R R R R P N L I E A > : 7 3 / , &4 0 - * ( ' & & & ' ) + . 2 5 9 < @ D I M P S U V W W W V T R O K H D A = 9 &6 3 0 . , + + + , - 0 2 6 9 = A D H L U X [ ] _ ` ` ` _ ^ [ Y U }R |N |J |G }C ~? &~@ = : 7 5 4 4 4 4 6 8 ; > A E I L P T ` c f i k l l l l j h |e yb w_ v[ vW vT vP xL &xM zI |F D B @ @ @ @ B D F I M Q U X [ _ n r u w y { { { { |y xw uu sr qn oj of oc o` q\ &q[ sX vU yR |P O O O O Q S V Y \ ` d g k o       ~ { w s p m j h~ gz gv gs go ik &hl ji mf pc sa w_ {_ ~_ _ ` b e h k o s v z ~      { w t p l i f c a _ _ _ _ `~ &a~ b{ ew hu ls oq sq vq zq ~s t w z ~        | y u r n k g c ` \ Z X V V V V X &X Z ] ` c g k n r v y |        v t q n k g c ` \ X U R O M L L L L N &N O R U Y \ ` c g k n r t v x x x x v m l i f b _ [ X T P M I G E C C C C E &E F I L P S W Z ^ b e i k m o o o o m d c ` ] Y V R O K G D @ > < : : : : < &; = ? B F I M P T X \ _ b d e f f f e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` -a *a 'a #` ^ \ Y V R N K H &I E A > ; 8 !6 %5 )5 ,5 05 47 79 :< =? ?B @F @J @M >` >d <h :k 7n 4q 1s -t )t &t "t r p m j g c _ \ &\ X U Q N L J #H 'H *H .H 1J 5L 8N :Q <U >Y >] >` <u <y :| 8 6 3 / + ' $      | x t q &q m j f c a _ !] %] (] ,] /_ 3a 6c 8f :j <n <r <u : : 8 6 4 1 - ) % "          &   { x v t r #r &r *r -t 1v 4x 6{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` ` ` _ ] Z W T P L I &I E A > ; 8 6 4 4 4 4 "5 %7 (: += -@ /D /H /K .\ .` -d +g (j %m "o q q q q p n k h e a ] Z &Z V R O L I G E E E E !F $H 'K *N ,Q .U .Y .\ -l -p ,t *w 'z $} !      ~ { x u q m j &j f b ^ [ Y W U U U U W $Y '[ )^ +b -e -i -l ,x ,| * ( & #           } y v &v r n k g e c a a a a c "e &g (j *n ,q ,u ,x + + ) ' % "           & } y v s q o n n n o q #s &v (y *} + + + + * ( & #            &      } } } } ~ ! $ ' ) + + + * * ) ' $ !           &           # & ( * * * ) ) ( & #           &           " % ' ) ) ) ( ( ' % "           &          ! $ & ( ( ( ' ' & $ !          &           # % ' ' ' & & % #           &           " $ & & & % % $ "           &          ! # % % % $$ #!        &             " $$$##"! $'*,.. ..-+ ( % "   &       !###")"-!147:<>> >>=; 8 5 2 . * '& ' #       """&")!8!< @CFIKM M MML J G D A = 9 6& 6 2 . + ( %#! ! !!"$'*-!1!5!8 G KORUXZ\ \ \\[ Y V S P L H E& E A = : 6 4200 002469= @ D GTX\_cegi iiig e c ` \ Y U R& S P L H E B @>= = =>@BEHLPS_bfjmprt u uut r p m j f b _& ^ Z V R O MKII IIKMORVY]`lptx{}   } { x t q m j& k h d ` ] Z XVUU UVXZ]`dhky|       | y& x t p m j g ecc c cdfiloswz          &    ~ { x vtss stvx{~        &                 &                 &                   &                     &                   &                    &           !$ ' )++ + + * ( % "    &            &*.14 7 9;; ; ; : 8 5 2 / + ' $& $         #&6:>AD GIKK K K J H E B ? ; 7 4& 4 0 , ) & # !     " %(+/36EIMP S VXZ Z Z Z Y W T Q N J F C& C ? ; 8 4 2 0 . . ..0 1 47:>BESW[^ b dfh h h h f e b _ \ X T Q& R O K G D A ? = < < <=? A DGKOR_bfj m prt u u u t r p m j f b _& ^ Z V S P M K I I IIJL ORUY]`             ~& ~ z v s o m k i i i ikm o rvy}                &                                 &                               &             6:>A D G I K K K K J H E B ? ; 7 4& 4 0 , ) % # !     ! # %(,/36ko s v z | ~     ~ | z w s p l i& i e a ^ [ X V T T T T U W Z ] `dhk                   &                                      &                                      &                    6 : > B E G I K K K K I G E B > ; 7 4& 4 0 , ) & # !      " % ( + / 3 6 a e i l o r t v v v v u s p m j f b _& ^ Z V S P M K J J J J L N Q T W [ _ b                   &   | y v s q p p p q r t w z ~                      &                                      &                                      &                                      &                                      &                                      &                                      &                    j g c _ \ Y V T S S S T U W Z ] a d h& i l p t w z | ~    ~ } z x t q m i 4 1 - ) & # !       # % ) , 0 4& 4 7 ; > B E G I J J J I H F C @ < 8 4                   &                                      &                    p m i e b _ ] [ Z Z Z [ \ _ a e h l p& p s w { ~           { x t p ' $                # '& ' * . 2 5 8 : < = = = < : 8 5 2 . * '                   &                                      &                    O L H D A > < : 9 9 9 : < > A D H L O& O R V Y ] ` b d e e e d c a ^ [ W S O                   &        ! " " " !                          &                                      &                    m j f b _ \ Y W V V V W X Z ] ` d h k& k n r v y |        ~ | x u q m Q N J F C @ = < : : : : < > @ D G K O& N Q U Y ] ` b d f f f f d b ` ] Y V R 3 0 , ( $ !         ! $ ( + /& 0 3 7 ; > A D F G G G G E C @ = : 6 2           &       " $ & & & & $ "      &       & & | y u q n j h f d d d d f g j m p t x & x {  | ~ T ~ Q ~ M I F B @ > < < < < > ? B E I L P & P S W Z ^ a d f g h h h g e b _ \  X ~ T y , y ) y % z " |              $ ( & ( + / 2 6 9 < > ? @ @ @ ? = : } 7 { 4 z 0 y , t  t  t u w z }  &             ~  {  x  v u t  o o o p r u x {  & | y v s q o o k k k l n q t w {  & } z v s p n l k e e e f h j m p t  x ~ { ~  ~  & ~ { w s o l i g f e ` u ` r ` n a j c f e c h ` l ^ o ] s \ v \ z \ ~ ] _ a d h k o & o r v z } } y v r n k g e b } a y ` u [ V [ S [ O \ K ^ H ` D c B f ? j > n = q = u = y > | @ B E H L P & P S W [ _ b  e { g x h t i q i m i i h e f b d _ a ] ] \ Z [ V W ; W 8 W 4 X 0 Z , \ ) _ & c $ f # j " m " q " u # y % | '  * . 1 5 & 4 8 ; ? B  F | I y K u M q N m N j N f M c L _ J \ G Z D X @ W < N  N N O  P  R U X \ ` d g k n r u w  y  z &z  z z  z  x  v  s  p m " i # e # b # ^ # Z ! W  T  Q  O  N  B B B B D F I L O S W Z ^ b e h k m n &n n n n l j h e a ] Y V R O K H F D B 3 3 3 3 5 7 9 < @ D H K O R V Y [ ] _ &_ _ _ _ ] [ Y V R N J G C @ < 9 7 5 3 # h # d # a # ] % Z ' V ) S , Q 0 O 4 M 8 M ; M ? M B O F Q I S K V M Z O ^ &O ] O a O d O h M l K p I s F u B w ? y ; y 8 y 4 y 0 w , u ) s ' p % l # i  (  $  !             ! % ( , 0  4  7  9  ;  =  &=  = = # = ' ; + : . 7 2 4 4 1 6 - 8 ) 8 & 8 " 8  6  5  2  /  ,  (         $ & ( * &* * * * ( & $ !               &          ^ Z W S O L I F D B B B B C E H K  N  R & R  V  Y  ]  a d g j l n n n n m k h e b ^                 &     # & ) + - - - - , * ' $ !  & & x t q m j f c ` ^ ] \ \ \ ] _ b e h l & l p s w { ~  | x O K H D @ = : 7 5 3 3 3 3 4 6 9 < ? C & C G J N R U X [ ] _ _ _ _ ^ \ Y V S O ~ 1 ~ - ~ * ~ &  "             ! % & % ) , 0 4 7 : = ? A A A A @ > ; 8 5 ~ 1 x  x  x  x  y  { ~            &      # & ) + , - - - , *  ( | % z ! y  w  v  v  v w y  {  ~           &U S Q O O O O Q S U X \ ` c g j n r u v x z | | | | z x v s o k h d a ] Y V &S Q P P P P R T W Z ] a e h l p s v y { } ~ ~ ~ ~ | z w t q m i f b ^ [ X U &W U S R R R S U W Z ] a e h l o s v y ~        ~ { x t! p" m" i" f! b _ \ &\ Z X W W W X Y \ _ b e i m p t x { ~         ! $ ~& {( w) s) p) l( h' e$ b! &a! _ ^ ] ] ] ^ ` b e i l p s w {          $ ( + . 0 1 }2 z2 v2 r1 n/ k- h* &i* f' e# d d d e g i l o s w z ~        # & * . 1 5 7 : ; < < ~< z; w9 s7 q4 &q5 o2 m. l* l& l# m n p s v z ~       ! $ ( , 0 3 7 : > A C E F F F E D }B z? &{@ y= w9 u5 u2 u. u+ w' y# { ~         * - 1 5 8 < ? C G J L N P P P P N L J &I F B > : 7 3 0 , ) ' % $ $ $ % & ( + 5 8 < @ D G K N R U W Y Z Z Z Y X V S &T Q M I F B ? ; 7 4 2 0 . . . . 0 2 4 > A E I L P S W [ ^ ` b d d d d b ` ^ &^ [ W S P L I E A > < : 8 8 8 8 : < > G J N R U Y \ ` d g i k m m m m k i g &h f b _ [ W T P L I F D B A A A B C F N P T W [ _ b f j m p r t u u u t s p &q n k h d ` ] Y U R O L J I I I I K M S V Y \ ` d g k o r u x z { { { { y w &y w t q n j f c _ [ X U R P O O O O Q U W Z ] ` d h k o s v y | ~     } &~ } { x u q m i f b _ [ X V T S S S T V W Y \ _ c g k n r u y | ~      &    } z w s o k h d ` ] Z X V U U U U V X Z ] ` d h k o s w z }     &{ }       } { x t p m i f b ^ [ S Q O M M M M O Q S V Z ^ a e h l p s &l p s u w y y y y w u s p l i e b ^ Z M I F D B @ @ @ @ B D F I M P T W [ _ &X \ ` c f i k l l l l j h e b _ [ W T B > : 7 4 1 / . . . . 0 2 5 8 ; ? C F &E I L P S V X Y Z Z Z Y W T Q N J F C . * ' #           " % ) - 0 &. 1 5 8 < ? A C E E E E C A ? < 8 4 0                    &    " % ( * , , , , + ) & #                       &                                      &                                      &                                      &                       } z w u t s s s t v x {    &                   n k g c ` ] Z Y W W W W Y [ ] a d h l &m p s w { ~         | y u q m T Q N J F C A ? > > > ? @ B E H L P T &T W [ _ b e g i j j j i g e b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'XpP X'O7P4MPXXdd7  METHOD7DDETERMINATIONOFNITROGENOXIDE Z EMISSIONSFROMSTATIONARYSOURCES(ALKALINEPERMANGANATE/IONCHROMATOGRAPHICMETHOD)  "   ' DXXpP X' NOTE: Thismethodisnotinclusivewithrespectto   specifications(e.g.,equipmentandsupplies)andprocedures  V (e.g.,samplingandanalytical)essentialtoits t  performance.Somematerialisincorporatedbyreferencefromothermethodsinthispart.Therefore,toobtainreliableresults,personsusingthismethodshouldhaveathoroughknowledgeofatleastthefollowingadditionaltestmethods:Method1,Method3,Method6,Method7,andMethod7C.1.0ScopeandApplication. v  1.1Analytes.*q./ ddd Xdd Xdd X(#(#q, dd ,dd ,pdd +  /0" L p/Analyte .0!0 .CASNo. .0!0 .Sensitivity J119! p 0 JNitrogenoxides(NOx), ^ asNO2,including: @  0 Nitricoxide(NO)  L L 0 Nitrogendioxide(NO2) <11+ "" L L11 <1010243910102440 211!"!%11 27ppmv1'%^&    11 1Ӏ 1.2Applicability.Thismethodappliestothe $`' measurementofNOxemissionsfromfossilfuelfiredsteam ~&$ ) generators,electricutilityplants,nitricacidplants,orothersourcesasspecifiedintheregulations.  +p%/ O 1.3DataQualityObjectives.Adherencetotherequirementsofthismethodwillenhancethequalityofthedataobtainedfromairpollutantsamplingmethods.2.0SummaryofMethod.  L  Anintegratedgassampleisextractedfromthestackandpassedthroughimpingerscontaininganalkalinepotassiumpermanganatesolution;NOx(NO+NO2)emissions   areoxidizedtoNO3.ThenNO3isanalyzedbyion \  chromatography.3.0Definitions.[Reserved] > 4.0Interferences.   SameasinMethod7C,Section4.0.5.0Safety. 0  5.1Disclaimer.Thismethodmayinvolvehazardousmaterials,operations,andequipment.Thistestmethodmaynotaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthistestmethodtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortoperformingthistestmethod. 5.2Corrosivereagents.Thefollowingreagentsarehazardous.Personalprotectiveequipmentandsafeproceduresareusefulinpreventingchemicalsplashes.If &-&, contactoccurs,immediatelyflushwithcopiousamountsofwaterforatleast15minutes.Removeclothingundershoweranddecontaminate.Treatresidualchemicalburnsasthermalburns. 5.2.1HydrogenPeroxide(H2O2).Irritatingtoeyes, j  skin,nose,andlungs.30%H2O2isastrongoxidizing .  agent;avoidcontactwithskin,eyes,andcombustiblematerial.Weargloveswhenhandling. 5.2.2SodiumHydroxide(NaOH).Causesseveredamagetoeyetissuesandtoskin.Inhalationcausesirritationtonose,throat,andlungs.Reactsexothermicallywithlimitedamountsofwater. 5.2.3PotassiumPermanganate(KMnO4).Caustic, 0 strongoxidizer.Avoidbodilycontactwith.6.0EquipmentandSupplies.   6.1SampleCollectionandSampleRecovery.SameasMethod7C,Section6.1.AschematicofthesamplingtrainusedinperformingthismethodisshowninFigure7C1ofMethod7C. 6.2SamplePreparationandAnalysis. 6.2.1MagneticStirrer.With25by10mmTefloncoatedstirringbars. 6.2.2FilteringFlask.500mlcapacitywithsidearm. &-&,  6.2.3BuchnerFunnel.75mmID,withspoutequippedwitha13mmIDby90mmlongpieceofTeflontubingtominimizepossibilityofaspiratingsamplesolutionduringfiltration. 6.2.4FilterPaper.WhatmanGF/C,7.0cmdiameter. 6.2.5StirringRods. 6.2.6VolumetricFlask.250ml. 6.2.7Pipettes.ClassA. 6.2.8ErlenmeyerFlasks.250ml. 6.2.9IonChromatograph.EquippedwithananionseparatorcolumntoseparateNO3,H+suppressor,and  necessaryauxiliaryequipment.NonsuppressedandotherformsofionchromatographymayalsobeusedprovidedthatadequateresolutionofNO3isobtained.Thesystemmust N alsobeabletoresolveanddetectNO2.  7.0ReagentsandStandards.  |  NOTE: Unlessotherwiseindicated,itisintendedthat "4  allreagentsconformtothespecificationsestablishedbytheCommitteeonAnalyticalReagentsoftheAmericanChemicalSociety,wheresuchspecificationsareavailable;otherwise,usethebestavailablegrade. 7.1SampleCollection. 7.1.1Water.DeionizeddistilledtoconformtoASTM *-&, specificationD119377or91Type3(incorporatedbyreferencesee60.17). 7.1.2PotassiumPermanganate,4.0Percent(w/w),SodiumHydroxide,2.0Percent(w/w).Dissolve40.0gofKMnO4and20.0gofNaOHin940mlofwater. j   7.2SamplePreparationandAnalysis. 7.2.1Water.SameasinSection7.1.1. 7.2.2HydrogenPeroxide(H2O2),5Percent.Dilute30 \  percentH2O21:5(v/v)withwater. z   7.2.3BlankSolution.Dissolve2.4gofKMnO4and > 1.2gofNaOHin96mlofwater.Alternatively,dilute60mlofKMnO4/NaOHsolutionto100ml. l  7.2.4KNO3StandardSolution.DryKNO3at110$Cfor2 0 hours,andcoolinadesiccator.Accuratelyweigh9to10gofKNO3towithin0.1mg,dissolveinwater,anddiluteto1  liter.CalculatetheexactNO3concentrationusing  | Equation7D1inSection12.2.Thissolutionisstablefor2monthswithoutpreservativeunderlaboratoryconditions. 7.2.5Eluent,0.003MNaHCO3/0.0024MNa2CO3. "&$ Dissolve1.008gNaHCO3and1.018gNa2CO3inwater,and '!& diluteto4liters.Othereluentscapableofresolvingnitrateionfromsulfateandotherspeciespresentmaybeused. 2-&,  7.2.6QualityAssuranceAuditSamples.SameasMethod7,Section7.3.10.Whenrequestingauditsamples,specifythattheybeintheappropriateconcentrationrangeforMethod7D.8.0SampleCollection,Preservation,Transport,and j  Storage. "   8.1Sampling.SameasinMethod7C,Section8.1. 8.2SampleRecovery.SameasinMethod7C,Section8.2. 8.3SamplePreparationforAnalysis. NOTE: Samplesmustbeanalyzedwithin28daysof  collection. 8.3.1Notethelevelofliquidinthesamplecontainer,anddeterminewhetheranysamplewaslostduringshipment.Ifanoticeableamountofleakagehasoccurred,thevolumelostcanbedeterminedfromthedifferencebetweeninitialandfinalsolutionlevels,andthisvaluecanthenbeusedtocorrecttheanalyticalresult.Quantitativelytransferthecontentstoa1litervolumetricflask,anddilutetovolume. 8.3.2Samplepreparationcanbestarted36hoursaftercollection.ThistimeisnecessarytoensurethatallNO2isconvertedtoNO3inthecollectionsolution.Takea -&, 50mlaliquotofthesampleandblank,andtransferto250mlErlenmeyerflasks.Addamagneticstirringbar.Adjustthestirringratetoasfastarateaspossiblewithoutlossofsolution.Add5percentH2O2inincrementsof  L approximately5mlusinga5mlpipette.WhentheKMnO4 j  colorappearstohavebeenremoved,allowtheprecipitatetosettle,andexaminethesupernatantliquid.Iftheliquidisclear,theH2O2additioniscomplete.IftheKMnO4color \  persists,addmoreH2O2,withstirring,untilthe z  supernatantliquidisclear.  NOTE: Thefasterthestirringrate,thelessvolume  ofH2O2thatwillberequiredtoremovetheKMnO4.) p QuantitativelytransferthemixturetoaBuchnerfunnelcontainingGF/Cfilterpaper,andfiltertheprecipitate.ThespoutoftheBuchnerfunnelshouldbeequippedwitha13mmIDby90mmlongpieceofTeflontubing.Thismodificationminimizesthepossibilityofaspiratingsamplesolutionduringfiltration.Filterthemixtureintoa500mlfilteringflask.Washthesolidmaterialfourtimeswithwater.Whenfiltrationiscomplete,washtheTeflontubing,quantitativelytransferthefiltratetoa250mlvolumetricflask,anddilutetovolume.ThesampleandblankarenowreadyforNO3analysis. 6-&, 9.0QualityControl. Z *q23 dd dd dd pdd ./(#(#q,dd , dd , dd +  301"  3Section 201!`01 2QualityControlMeasure 201!`01 2Effect C9!`   01 xC8.2,10.110.3    Samplingequipmentleakcheckandcalibration     Ensureaccuratemeasurementofsamplevolume 6,   x  x610.4  B  Spectrophotometercalibration  $ Ensurelinearityofspectrophotometerresponsetostandards 6, x  x611.3  `  Spikedsampleanalysis  `  Ensurereductionefficiencyofcolumn =1,B  x  x=11.6 21!B 1 2Auditsampleanalysis 21!B 1 2Evaluateanalyticaltechnique,preparationofstandards1'%` x   1 110.0CalibrationandStandardizations. 4  10.1DryGasMeter(DGM)System. 10.1.1InitialCalibration.SameasinMethod6,Section10.1.1.Fordetailedinstructionsoncarryingoutthiscalibration,itissuggestedthatSection3.5.2ofCitation4inSection16.0ofMethod7Cbeconsulted. 10.1.2PostTestCalibrationCheck.SameasinMethod6,Section10.1.2. 10.2ThermometersforDGMandBarometer.SameasinMethod6,Sections10.2and10.4,respectively. 10.3IonChromatograph. 10.3.1Diluteagivenvolume(1.0mlorgreater)oftheKNO3standardsolutiontoaconvenientvolumewith X+$5 water,andusethissolutiontopreparecalibration -&7 standards.Prepareatleastfourstandardstocovertherangeofthesamplesbeinganalyzed.Usepipettesforalladditions.RunstandardsasinstructedinSection11.2.Determinepeakheightorarea,andplottheindividualvaluesversusconcentrationingNO3/ml. j   10.3.2Donotforcethecurvethroughzero.Drawasmoothcurvethroughthepoints.Thecurveshouldbelinear.Withthelinearcurve,uselinearregressiontodeterminethecalibrationequation.11.0AnalyticalProcedures. >  11.1Thefollowingchromatographicconditionsarerecommended:0.003MNaHCO3/0.0024Na2CO3eluentsolution ` (Section7.2.5),fullscalerange,3MHO;sampleloop,0.5ml;flowrate,2.5ml/min.TheseconditionsshouldgiveaNO3retentiontimeofapproximately15minutes(Figure  7D1). 11.2Establishastablebaseline.Injectasampleofwater,anddeterminewhetheranyNO3appearsinthe R$" chromatogram.IfNO3ispresent,repeatthewater &$ load/injectionprocedureapproximatelyfivetimes;thenreinjectawatersampleandobservethechromatogram.WhennoNO3ispresent,theinstrumentisreadyforuse.Inject b+%* calibrationstandards.Theninjectsamplesandablank. &-&, Repeattheinjectionofthecalibrationstandards(tocompensateforanydriftinresponseoftheinstrument).MeasuretheNO3peakheightorpeakarea,anddeterminethe   sampleconcentrationfromthecalibrationcurve. 11.3AuditAnalysis.SameasinMethod7,Section11.4.12.0DataAnalysisandCalculations.    Carryoutcalculations,retainingatleastoneextrasignificantfigurebeyondthatoftheacquireddata.Roundofffiguresafterfinalcalculation. 12.1Nomenclature.SameasinMethod7C,Section12.1. 12.2NO3concentration.CalculatetheNO3 0 concentrationintheKNO3standardsolution(seeSection N 7.2.4)usingthefollowingequation:8:9;P@<x ( X 0X @XddddddddE  2dC j'     (#(#           (#(#   12.3SampleVolume,DryBasis,CorrectedtoStandardConditions.SameasinMethod7C,Section12.4. 12.4TotalgNO2PerSample. )P#(  n+%* 8UV>QA=x ( X pX @XddddddddE Z  d D Zp   (#(#                (#(#  |(Xp` P hp x (#%'0*,.8135@8:<H?ACPFHKXMOR`TVDX p where: p 250 P  =0 Volumeofpreparedsample,ml..  (# (#  p 1000 =0 TotalvolumeofKMnO4solution,ml.  (# (#  p 50 P  =0 AliquotofKMnO4/NaOHsolution,ml.\  (# (#  p 46.01 =0 MolecularweightofNO2.z  (# (#  p 62.01 =0 MolecularweightofNO3.> (# (#  p 12.5SampleConcentration.SameasinMethod7C,Section12.7.13.0MethodPerformance. 0  p 13.1Precision.Theintralaboratoryrelativestandarddeviationforasinglemeasurementisapproximately6percentat200to270ppmNOx.  p  p 13.2Bias.ThemethoddoesnotexhibitanybiasrelativetoMethod7. p 13.3Range.ThelowerdetectablelimitissimilartothatofMethod7C.Noupperlimithasbeenestablished;however,whenusingtherecommendedsamplingconditions,themethodhasbeenfoundtocollectNOxemissions b+%* quantitativelyupto1782mgNOx/m3,asNO2(932ppmNOx). &-&, 14.0PollutionPrevention.[Reserved] Z 15.0WasteManagement.[Reserved]  16.0References.    p SameasMethod7C,Section16.0,References1,2,4,and5.17.0Tables,Diagrams,Flowcharts,andValidationData.  .  BDEM=9z Xp`n3'@@@EZXo.8XZ7   (#(#                                                                       (#(#