IS 330: Chromium trioxide

15 Pages·1992·1.6 MB·English

by  Bureau of Indian Standards

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timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 330 (1992): Chromium trioxide [CHD 5: Electroplating
Chemicals and Photographic Materials]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

SI 330 : 1992
7bfmTg w-cm;
+mw$rT s$mTT~- f&%Tfk
g;r*m)
(3-T
Indian Standard
CHROMIUM TRIOXIDE - SPECIFICATION
( Second Revision )
UDC 661 : 876 : 1

@ BIS 1992
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
December 1992 Price pomG 4
gnitalportcelE slacimehC lanoitceS ,eettimmoC CHD 05
DROWEROF
sihT naidnI dradnatS was adopted yb the uaeruB of naidnI ,sdradnatS after the draft dezilanif
yb the gnitalportcelE slacimehC lanoitceS eettimmoC had neeb devorppa yb the lacimehC
noisiviD .licnuoC
nI the gnitalportcele yrtsudni muimorhc edixoirt ( netfo dellac cimorhc dica ) si desu ni gnikam
pu the muimorhc gnitalp htab desu for evitaroced gnitaoc revo copper or ;lekcin evitcetorp
sgnitaoc no lla sisab ;slatem hard stisoped revo suorref slatem for ,sloot seid dna ;seguag for
gnivig na edixo mlif no muinimula ;ecafrus suorop sgnitaoc for devorpmi ,noitacirbul etc.
sihT dradnats si the dnoces noisiver of SI 330 : 1951 noitacificepS‘ for cimorhc .’dica nI the tsrif
noisiver of siht ,dradnats the muimorhc edixoirt tnetnoc was detalupits at 5-89 tnecrep yb ssam
as derapmoc ot that of 98.0 tnecrep deificeps ni the lanigiro .dradnats nI ,noitidda stnemeriuqer
of lacityiana grade ,lairetam ylsuoiverp derevoc ni SI 559 : 1954 noitacificepS‘ for muimorhc
edixoirt ( muimorhc dica )‘, lacitylana ,tnegaer were osla .dedulcni nI siht ,noisiver laiceps
stnemeriuqer for muimorhc edixoirt for cinortcele yrtsudni evah neeb added ot ekam siht
dradnats erom .evisneherpmoc
roF the esoprup of gnidiced whether a ralucitrap tnemeriuqer of siht dradnats si deilpmoc
,htiw the lanif ,eulav devresbo or ,detaluclac gnisserpxe the tluser of a test or ,sisylana
llahs eb dcdnunr off ni ecnadrocca htiw SI 2 : 1960 seluR‘ for gnidnuor off laciremun seulav
( revtsed )’ . ehT rebmun of tnacifingis secalp deniater ni the dednuor off eulav dluohs eb the
emas as that of the deificeps eulav ni siht .dradnats
IS 330 : 1992
Indian Standard
MUIMORHC EDIXOIRT - NOITACIFICEPS
(
Second Revision )
1 SCOPE tnegaer grade llahs eb ylidaer elbulos ni water,
gnimrof a ,raelc deruoloc-egnaro .noitulos
sihT dradnats sebircserp the stnemeriuqer dna
the sdohlem of gnilpmas dna test for mmmorhc 4.3 ehT lairetam llahs osla ylpmoc htiw the
edixoirt ( cimorhc dica ) for esu ni -aiportcele stnemeriuqer dial nwod ni elbaT 1, nehw tested
,gnit gnizidona work dna as lacitylana .tnegaer ni ecnadrocca htiw the dohtem debircserp ni
xennA .A
2 REFERENCES
4.3.1 roF esu ni hard emorhc ,gnitalp the
ehT naidnI sdradnats detsil woleb are the stnemeriuqer of muimorhc edixoirt ( as CrO, ),
yrassecen stcnujda ot siht :dradnats rettam elbulosni ni water dna etahplus ( as
SO, ) yam eb as agreed ot lieewteb the resahcrup
IS No. Title dna the .rerutcafunam
1070 : 1992 tnegaeR grade water - -icepS
4.4 Special Requirements for Electronics Industry
noitacif ( third revision )
1260 lacirotciP sgnikram for -dnah roF scinortcele ,yrtsudni the lairetam llahs osla
( Part 1 ) : 1973 gnil of :sdoog Part 1 -egnaD ylpmoc htiw the stnemeriuqer nevig ni elbaT 2
suor goods (first revision ) ni noitidda ot those nevig ni elbaT 1, nehw
tested ni ecnadrocca htiw the sdohtem debircserp
3 GRADES ni xennA .A
erehT llahs eb two grades of the ,lairetam as 5 PACKING
:swollof
5.1 ehT lairetam llahs eb packed ni htuom-ediw
edarG I - gnitalportcelE grade, elbatius ssalg selttob or sraj dedivorp htiw dnuorg-llew
for gnitalportcele dna gnizidona thgit-ria ssalg stoppers. ehT gnitalportcele grade
lairetam yam osla eb packed ni elbatius thgit-ria
edarG II - lacitylanA tnegaer grade
leets .smurd
4 REQUIREMENTS 5.1.1 ehT ,lairetam nehw packed, llahs ton emoc

ni tcatnoc htiw cinagro ,secnatsbus as -rehto
4.1 Description esiw tneliov noitca thgim .tluser
NOITUAC - euD ot sti evisorroc dna
4.1.1 Electroplating Grade
suonosiop ,erutan diova tcatnoc htiw .niks
ehT lairetam llahs tsisnoc of hsidder ot dark
hsinworb selunarg of sekalf of ylhgih -orgyh 6 MARKING
cipocs dna evisorroc character.
6.1 ehT ,sreniatnoc dna osla the packages
where ,elbissop llahs eb ylbatius dekram ni red
4.1.2 Analytical Reagent Grade
srettel ton ssel naht 2.5 mc ;hgih dna smurd
ehT lairetam llahs eb ni the mrof of dark, llahs eb dekram ni red srettel ton ssel naht
der-hsinworb slatsyrc of ralunarg powder of 5 mc ,hgih htiw the words ,EVISORROC‘
ylhgih cipocsorgyh character. ELDNAH HTIW .’ERAC yehT llahs osla eb
dekram htiw ehI ,eman dna grade of the -etam
;lair sti thgiew dna noitacidni of the ecruos of
4.2 Solubility
Lrutcaf&am
ehT lairetam of gnitalportcele grade llahs eb
ylhgih elbulos ni ;retaw 10 g of ti nehw -lossid 6.1.1 ehT packages dna smurd llahs osla eb
dev ni 25 lm of water llahs evig a raelc red dellebal as nwohs ni .giF 15 of SI 1260
noitulos no .gnilttes ehT lairetam of lacitylana ( Part 1 ) : 1973.
1
SI 330 : 1992
Table 1 Requirements for Chromium Trioxide
( Clauses 4.3, 4.4 and 6.1.2 )
SI Characteristric Requirements for Method of
No, r------ ------*_--_--~ Test
gnitalportcelE lacitylanA
edarG tnegaeR
edarG
(1) (2) (3) (4) (5)
)i muimorhC edixoirt ( sa ,OrC j , 98.5 99.00 2-A
tnecrep yb ,ssam Min
)ii rettaM elbulosni ni ,retaw 0.15 To ssap eht 3-A
tnecrep yb ,ssam XUM tset
)iii setahpluS ( sa SO1 ,) tnecrep yb 0.20 To ssap eht 4-A
,ssam Mnx tset
)vi ilaklA stlas ( sa Na,O ,) tnecrep 0.30 0.200 5-A
yb ,ssam Max
v j sedirolhC ( sa lC ,) tnecrep yb 0 50 0.005 6-A
,ssam
MUX
)iv setartiN ( sa NO, ,) tnecrep yb - 4mo A-7
,ssam xauVi
)iiv ,muinimulA nori dna tnelavirt - 0.030 8-A
muimorhc ( sa RIOI >, tnecrep
yb ,ssam XUM
Table 2 Additional Requirements for Chromium Trioxide for Electronics Industry
( Clauses 4.4 and 6.1.2 )
SI Characteristics Requirements Method of Test
No.
(1) (2) (3) (4)
)i etahpluS ( sa SO4 ,) tnecrep yb ,ssam MUX 0.005 5.4-A
ii) norI ( sa eF ,) tnecrep yb ,ssam XJLVI 0.01 9-A
)iii muissatoP ( sa K ,) tnecrep yb ,ssam MUX 0.1 01-A
)vi muidoS ( sa Na .) tnecrep yb ,ssam Max 0.05 11-A
6.1.2 For Analytical Reagent edarG 7 SAMPLING

In addition, eht sreniatnoc fo eht lacitylana 7.1 ehT dohtem fo gniraperp evitatneserper
tnegaer edarg lairetam shall osla eb dellebal samples fo eht lairetam dna eht airetirc rof
htiw lluf lacitylana data rof all eht -siretcarahc ytimrofnoc fo eht lairetam ot this noitacificeps
scit of taht edarg debircserp ni selbaT 1 and 2. shall eb degduj as debircserp ni xennA B.
ANNEX A
( Clause 4.3 )
ANALYSIS OF CHROMIUM TRIOXIDE
A-l QUALITY OF REAGENTS A-2 DETERMINATION OF CHROMIUM
TRIOXIDE
A-I.1 Unless deificeps ,esiwrehto erup -imehc
qlac and dellitsid retaw ( ees SI 1070 : 2991 ) 0.2-A lareneG
shall eb desu ni .stset
muimorhC edixoirt si denimreted yb gnitartit
NOTE - eruP< ’slacimehc llahs naem slacimehc taht
od ton niatnoc seitirupmi hcihw tceffa eht stluser fo eht detarebil enidoi gnisu hcrats noitulos sa
.sisylana .rotacidni
2
SI 330 : 1992
v, =
A-2.1 Reagents emulov ni sertilillim of etahplusoiht
noitulos deriuqer ni the knalb test, dna
A-2.1.1 Hydrochloric Acid
M= ssam ni smarg of the lairetam nekat
yletamixorppA 10 tnecrep ,noitulos prepared yb for the test
gnitulid 270 lm of detartnecnoc cirolhcordyh N= ytilamron of the dradnats muidos
dica ( see SI 265 : 1962 ) of cificeps ytivarg 61-l etahplusoiht noitulos desu
htiw water ot 1 000 .lm
3-A NOITANIMRETED FO -RETAW
2.1.2-A Potassium Iodide - ,dilos free morf ELBULOSNI RETTAM
.etadoi
1.3-A Procedure
3.1.2-A Standard Sodium Tlziosulphate Solution hgieW ,yletarucca tuo of na thgit-ria gnihgiew
yletamixorppA 0.1 N. evlossiD tuoba 25 g of ,elttob tuoba 20 g of the lairetam dna evlossid
muidos etahplusoiht slatsyrc ( Na,Sz0,*5H,0 ) ti ni 200 lm of water. Heat no a maets htab for
ni ylhserf deliob dellitsid water, add 0.1 g of e::o .ruoh retliF hguorht a tared hcooG elbicurc
muidos etanobrac ( see SI 296 : 1965 ) dna ekam htiw na sotsebsa tam or a deretnis ssalg elbicurc
pu the emulov ot 1 000 .lm wollA the noitulos ( G No. 4 ). ehT sotsebsa tam no the hcooG
ot dnats for a yad dna neht nohpis tuo the elbicurc dluohs eb ylsuoiverp treated htiw a hot
tnatanrepus .diuqil ettepiP 25 lm of dradnats noitulos of cimorhc dica dna deird erofeb
muissatop etamorhcid noitulos (0.1 N ) otni a .gnirat hsaW llew dna yrd the elbicurc ot -snoc
lacinoc .ksalf ddA 5 lm of cirolhcordyh ,dica tnat thgiew at 105 ot .C°011 looC the elbicurc
2 g of muissatop edidoi dna rotate ot .xim wollA ni a rotaccised dna .hgiew
ot dnats for 5 setunim dna neht add 100 lm of
water. etartiT htiw the etahplusoiht ,noitulos 2.3-A Calculation
gnisu starch noitulos as rotacidni towards the elbulosnI ,rettam
.dne tnecrep yb ssam = + 100 M
4.1.2-A Starch Solution where
etarutirT 1 g of erup elbulos starch htiw 30 lm ,VI = ssam ni smarg of the ,eudiser dna
of water ni a .ratrom tuoP the gnitluser paste
M = ssam ni smarg of the lairetam nekat
otni 1 iI tre of gniliob water, liob for 3 ,setunim
for the test
wolla the noitulos ot looc dna tnaced off the
raelc .diuqil PrepaPe tsuj erofeb .esu 3.3-A Determination of Insoluble Matter in
Material of Analytical Reagent Grade
2.2-A Procedure
hgieW ,yletarucca tuo of na thgit-ria gnihgiew
yletaruccA ,hgiew tuo of na thgit-ria gnihgiew ,elttob tuoba 25 g of the ,lairetam evlossid ti ni
,elttob tuoba 5 g of the lairetam dna evlossid ti water dna etulid ot 250 .lm
ni water. Make the noitulos pu ot yltcaxe 1 000
1.3.3-A ehT lairetam llahs eb nekat ot evah
lm dna xim .ylhguoroht ettepiP tuo 25 lm otni a
dereppots-ssalg ,ksalf add 5 lm of cirolhcordyh passed the test fi the noitulos deniatbo si raelc
dna egnaro .deruoloc
dica dna 3 g of muissatop edidoi dna tel ti dnats
ni the dark for 15 .setunim etuliD htiw 100 lm 4-A NOITANIMRETED FO SETAHPLUS
of water, dna etartit the detarebil enidoi htiw
dradnats muidos etahplusoiht ,noitulos gnidda 0.4-A General
starch noitulos towards the d.-ie of the noitartit
etahplnS are denimreled ni the lairetam of
dna gniton the tniop-dne nehw the eulb ruoloc
gnitalportcele grade yb cirtemivarg dohtem
tsuj .sraeppasid yrraC tuo a knalb test of eht
,dna of lacitylana tnegaer grade dna -alportcele
stnegaer .yletaidemmi
gnit grade for scinortcele yrtsudni yb ytidibrut
3.2-A Calculation test.
muimorhC edixoirt 1.4-A Reagents
( as CrO, ), -rep
133.3 x Nx ,V-V
tnec yb ssam = A-4.1.1 Rectified Spirit - 95 tnecrep yb emulov
M ( see SI 323 : 1959 ).
where
2.1.4-A Concentrated Hydrochloric Acid - sp gr
V = emulov ni sertilillim of dradnats 1.16 ( see SI 265 : 1962 ).
muidos etahplusoiht noitulos deriuqer
yb 25 lm of the noitulos of the 3.1.4-A Barium Chloride Solution - -amixorppa
,lairetam ylet 10 tnecrep ( m/v ).
3
IS 330 : 1992
A-4.1.4 Dilute Hydrochloric Acid - -amixorppa A-4.4.2 Procedure
ylet eno tnecrep ( v/v ).
evlossiD 4.00 g of the lairetam ni 50 lm of
A-4.1.5 Acetic Acid - .laicalg water, add 1 lm of etulid cirolhcordyh dica dna
1 lm of muirab edirolhc .noitulos wollA ot
A-4.2 Procedure dnats for 3 .sruoh
hgieW yletarucca tuoba 10 g of the lairetam
1.2.4.4-A ehT lairetam llahs eb nekat ot evah
dna evlossid ni 50 lm of water. retliF otni a
deifsitas the tnemeriuqer of the test fi on turbi_
ssalg rekaeb hguorht a mc-7 retlif paper ot
ytid or a etatipicerp si decudorp ni 3 .sruoh
etanimile yna elbulosni .rettam hsaW the retlif
paper llew htiw water dna add ot the etartlif 5.4-A Turbidity Test for Sulphates in Material
10 lm of deifitcer ,tirips 35 lm of detartnecnoc of Analytical Reagent Grade
cirolhcordyh dica dna 10 lm of laicalg citeca
.dica Heat litnu lla the etamorhc si decuder ot A-4.5.0 General
the neerg tnelavirt .mrof lioB ’lfo tsom of the
edyhedla ,demrof dna add ot the noitulos 6 ot setahpluS are denimreted yb gnirapmoc the
ytidibrut decudorp yb the lairetam htiw muirab
8 lm of muirab edirolhc noitulos hguorht the
edirolhc noitulos tsniaga that decudorp yb a
emas retlif paper. etuliD the noitulos ot 150 lm
htiw water, heat the noitulos tuohtiw gniliob dradnats etahplus .noitulos
for 4 sruoh dna wolla ot dnats .thginrevo retliF
the noitulos gniniatnoc muirab etahplus hguorht 1.5.4-A Reagents
a tared deretnis ssalg elbicurc ( G No. 4 ) or a A-4.5.1.1 Dilute hydrochloric acid - -amixorppa
hcooG .elbicurc hsaW the muirab etahplus ylet 5 N.
eudiser htiw etulid cirolhcordyh dica llit the
eudiser si free morf muimorhc stlas dna neht 2.1.5.4-A Barium chloride solution - -amixorppa
htiw water llit ti si free morf .sedirolhc yrD the ylet 10 .tnecrep
eudiser ot tnatsnoc thgiew at 105” ot ,C’OlI dna
.hgiew yrraC tuo a knalb test no stnegaer 3.1.5.4-A Standard sulphate solution
.yletaidemmi
evlossiD 181-O 4 g of muissatop etahplus ni
water dna ekam pu the emulov ot 1 000 .lm
NOTES
ekaT 10 lm of siht noitulos dna etulid ti rehtruf
1 retiA gnidnats thginrevo retlif niaga fi ereht si
ot 100 .lm enO ertilillim of the lanif noitulos si
yna .etatipicerp
tnelaviuqe ot 0.01 gm of etahplus ( as SO4 ).
2 ssecxE fo muirab edirolhc si yrassecen ot ecuder
eht ytilibulos fo muirab .etahplus noitatipicerP ni
toh yb-noitulos noitidda fo muirab edirolhc ni a 2.5.4-A Procedure
wols maerts htiw gnilritS lim sezimi lacinahcem
evlossiD 4 g of the ,lairetam yletarucca dehgiew
noisulcco fo muirab edirolhc dna sevig a esraoc
etatipicerp hcihw si ssel elbulos ni .sdica ni 50 lm of water ni a relsseN .rednilyC oT siht
,noitulos add 1 lm of etulid edirolhcordyh dica
A-4.3 Calculation dna 2 lm of muirab edirolhc .noitulos ritS the
erutxim dna wolla ot dnats for 20 .setunim
setahpluS ( as SO4 ), 41.15 M, yrraC tuo a lortnoc test ni the other relesseN
tnecrep yb ssam = rednilyc gnisu 2 lm of dradnats etahplus -ulos
1M
noit dna the emas seititnauq of other ,stnegaer
where yllanif gnitulid ot the .kram
M, = ssam ni smarg of the muirab etahplus
1.2.5.4-A ehT timil llahs eb nekat as ton gnivah
,eudiser dna
neeb exceeded fi the ytidibrut decudorp ni the
M = ssam ni smarg of the lairetam nekat test htiw the lairetam si ton greater naht that
for the test. decudorp ni the lortnoc test.
4.4-A Turbidity Test for Sulphates in Material of 5-A NOITANIMRETED FO ILAKLA STLAS
Analytical Reagent Grade
1.5-A Procedure
A-4.4.1 Reagents ylluferaC etingi ni a nialecrop ,hsid tuoba 5.I g
of the lairetam yletarucca dehgiew tuo of na
A-4.4.1.1 Dilute hydrochloric acid - -amixorppa
thgit-ria gnihgiew ,elttob dna etarutirt htiw
ylet 5 N.
10 lm of hot water. retliF hguorht a llams retlif
2.1.4.4-A Bilrium chloride solution - -amixorppa paper dna wash htiw 10 lm of hot water. -opavE
yjet 12 tnecrep ( m/v ). rate the extract. mraW the eudiser htiw 30 lm
4
IS 330 : 1992
of water, ,retlif wash htiw 10 lm of hot water where
dna etaropave ni the emas .hsid etingI the
M1 = ssam ni smarg of revlis ,edirolhc dna
detaropave eudiser ot tnatsnoc .thgiew
M = ssam ni smarg of the lairetam nekat
for the test.
2.5-A Calculation
ilaklA stlas ( as Na,O ), 4.6-A Turbidity Test for Chlorides in Material of
tnecrep yb ssam - 100 lM Analytical Reagent Grade
M
where A-6.4.1 Reagents
M, = ssam ni smarg of the ,eudiser dna $-b$.l.l Dilute nitric acid - yletamixorppa
M = ssam ni smarg of the lairetam nekat
for the test. 2.1.4.6-A Silver nztrate yletamixorppa-noitulos
5 tnecrep ( v/m ).
6-A NOITANIMRETED FO SEDIROLHC
2.4.6-A Procedure
0.6-A General
evlossiD 000.I g of the lairetam ni 20 lm of
sedirolhC are denimreted ni the lairetam of water dna add 10 lm of etulid cirtin .dica Heat
gnitalportcele grade yb cirtemivarg dohtem the noitulos ot C°05 dna add 1 lm of revlis
,dna of lacilylana tnegaer grade yb ytidibrut etartin .noitulos
test.
1.2.4.6-A ehT lairetam llahs eb nekat ot evah
1.6-A Reagents ton exceeded the timil debircserp ni elbaT 1 fi
on ytidibrut si decudorp nihtiw 2 .setunim
A-6.1.1 Concentrated Nitric Acid - sp gr I.42
( see iS 264 : 1950 ). 7-A TSET ROF SETARTIN
2.1.6-A ‘Silver Nitrate Solution - yletamixorppa 1.7-A Reagents
5 tnecrep ( m/v ).
A-7.1.1 Dilute Sulphuric Acid - yletamixorppa
A-6.1.3 Dilute Ammonium Hydroxide Solution - 5 N.
yletamixorppa 4 N.
2.1.7-A Hydrochloric Acid - yletamixorppa
A-6.1.4 Dilute Nitric Acid - yletamixorppa 4 N. II N.
2.6-A Procedure 3.1.7-A Dilute Ammonium Hydroxide Solution -
yletamixorppa 5 N.
hgieW yletarucca tuoba 10 g of the lairetam
dna evlossid ni 150 lm of water. ret liF ot niatbo A-7.1.4 Barium Chloride Solution - evlossiD
a raelc .noitulos hsaW ent retlif paper ylluferac 3 g of muirab edirolhc slatsyrc ni 10 lm of water

dna tcelloc the gnihsaw ni the rekaeb -niatnoc dna .retlif
gni the .etartlif Make pu the gnitluser noitulos
ot tuoba 200 .lm ddA a few drops of -necnoc 5.1.7-A Standard Potassium Nitrate Solution
trated cirtin dica dna neht na excess of revlis
evlossiD 1.63 g of muissatop etartin ni water
etartin .hoitulos wollA the noitulos ot dnats
dna ekam pu the emulov ot 1 000 .lm ekaT
.thginrevo retliF the noitulos hguorht a hcooG
10 lm of siht noitulos dna etulid niaga ot 1 000
elbicurc or deretnis ssalg elbicurc ( G NO. 4 ).
lm yletaidemmi erofeb ;esu 1 lm of siht noitulos
hsaW the ,etatipicerp tsrif htiw etulid cirtin
si tnelaviuqe ot 0.01 gm of etartin ( as NO, ).
dica ot evlossid yna gnirehda revlis etamorhc
dna neht htiw dloc water. evlossiD the -ipicerp 6.1.7-A Standard Indigo Carmine Solution
tate ni etulid muinomma edixordyh noitulos
dna etatipicerper yb the noitidda of etulid evlossiD 0.20 g of ogidni enimrac ni 500 lm of
cirtin .dica retliF hguorht a tared hcooG etulid ciruhplus ,dica add 20 lm of -olhcordyh
elbicurc or dcretnis ssalg elbicurc ( G No. 4 ) cir dica dna tneiciffus etulid ciruhplus dica ot
dna wash htiw water. yrD the elbicurc dna sti ecudorp I 000 .lm ezidradnatS the SOhtiOn SO
stnetnoc ot tnatsnoc thgiew at 130” f .C°2 that 10 lm added ot 2.0 lm of dradnats -satop
muis etartin noitulos si tsuj deziruoloced no
3.6-A Calculation gnidda 12 lm of detartnecnoc ciruhplus dica
dna gnitaeh ot .gniliob enO ertilillim of the
sedirolhC ( as lC )
24.74 M1 noitulos si tnelaviuqe ot 0.02 gm of etartin
tnecrep yb ssam = M
( as NO, ).
5