EdibleMaizeStarch is-1005 1992

8/13/2019 EdibleMaizeStarch is-1005 1992

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IS 1 6 : 1992

lfynr lftRiT t ~ f f fiT 3TTef - f rfuftru TfU8fVT

ndi n StandardEDIBLE MAIZE STARCH CORN FLOUR -SPECIFICATION

Third Revision

UDC 664 258

I BIS 1992BUR E A U OF I N D I A N S TAN DAR D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARO

NEW DELHI 110002June 992 Price Groop J

Reaffirmed 992009


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AMENDMENT NO.1 OcrOBER 1998TOIS 100S: 1992 EDIBLE MAIZE STARCH CORNFLOUR) - SPECIFICATION TAint R ~ i s i l l

3, Table t, 51No iv), col 4 I Substitute 9 of IS 4706 Part 2 ) :1978 for uwNore .

age 3, Table 1, ) - Delete.

FADt7 RepropaphyU iI BIS. NewDelhi. India


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Edible Starches and Starch Products Sectional Committee, FAD 17

FOR WORThil Indian Standard Third Revision) was a do pt ed by the Bu reau of Indian Standards, after the draftfinalized by the Edible Starches and Starch Products Sectional Committee had been approved by theFood and Agriculture Division Council.E di bl e m ai ze s ta rc h corn flour \ is widely us in the country for tbe preparation of Indian sweeta likeHALWA GUUB l MUN PH RlNl etc. It serves as a thidner in soup and gravy. It also finds itl use in. \he manufacture o biscuits, confecticnery, baking powder, cosmetics and as a bind ing and diluting gmtio the manufacture of pharmaceutical products, such as pills and tablets.This standard was first published in 1957. Its t n t revision was issued in 1969 to incorporate additionalrequirements for starch, protein content and free acidity, apart from modifications of lesser importance. Inthe second revision in 1976, requlrements for acid insoluble ash was modif ied in addition to other chaages,In the third revision limits have been introduced for metallic and microbiological impurities and the limitsfor to ta l ash h av e b ee n re du ced .In the preparation of this standard due consideration has b ee n given to the relevant Rules prescribed bythe Government of India under the Prewnt oll ofFood AdullerDtioll Act 1954 and the Standards ofWeighJs lindMIIJS1l1IS PackQged Commodities Rules 1977. However, this standard is subject to the restrictions imposedUDder these, wherever applicable.For the purpose of deciding whether a particular requirement of t hi s standard is complied with. the final a l ~ observed or calculated, expressing the result of a or analysis, shall be r ounded off in accor dancewith IS 2 : 1960 RuJes for rounding off numerical v al ue s lJisd ) . The number of signi fi ca nt pla ce sretained in the rounded off v alu e s ho ul d be the same as that of th e specified value in \bia standard.


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IS 1005.1 2Indian Standard

EDIBLE M IZ STARCH CORN FLOUR)-SPECIFICATION( Third Revision)

1 SCOPEThis standard prescribes the requirements andthe metnods of sampling and test for edible maizestarch corn flour .2 REFERENCESThe Indian Standards lilted in Annex. A arenecessary adjuncts to thi. standard.3 TERMINOLOGYFor the purpose this standard, edible maizestarch corn flour .hall mean starch obtainedfrom maize (Zeamays Linn.) manufactured bythe wet grinding process. as dist inct from maize corn) flour popularly known al M K r KAA A in Hindi.4 REQ.UIREMENTS4.1 neacriptloaThe material sha ll be in the form of a fine powder.It shall normally be white in colour, except whenprepared from yellow maize in which case it maybe light creamy. It shall be free from rancidity;adulterants; insect or fungus infestation; and fromfermented, musty or other objectionable odours.It shall not contain added sweetening, flavouring,colouring agents or any foreign matter.4.2 Microscopic Appearaace aad GraDuleSizeWhen the material is subjected to the microscopicexamination prescribed in IS 4706 Part 1 :1978, the starch granules shall conform to th efollowing description:

Maize starch granules re usually polygonalor rounded in shape and appear to be quiteuniform in size. The longest axis ranges from10 to 30 I m (001 to 003 mm . The hilumis fairly marked and is starred with fissuresbu t no str iae are observed; distinct polarizedcrosses are, however, seen.NOTE - To racHitate ealY identification of theItarch Iranulel, a photomicrograph or maize starch been provided in Fig. I.

4.3 The material, when examined by the methodprescribed in 6 of IS 4706 Part 1 : 1978 shalle free from dir t and other suspended and extra-neous matter.

4.4 Particle SizeWhen tested by the method prescribed in :J ofIS 4706 Part 1 : 19:8, no t more than 2 per-cent by mass of the material shall be retained on75-micron IS Sieve and not moretban 0-5 percentby mass shall be retained on a ISO-micron ISSieve.

NOTE - In case 75-microD and 15O-micron IS Sieves conformilll to IS 460 : 1985) are not ava ilabl e, BSTest Seive 200, ASTM Sieve 200 and Tyler Sieve 200,aad BS Telt Sieve 100, ASTM Sieve 100 aDd TylerSieve 100 which have thei r apertur t l within thespecified for 75-microo aDd 150-micron IS Sieves respectively, may be used.

4.5 HYlieDle ColldltloD.The material shall be manufactured in premises.and equipment maintained under hygienic conditions S IS 2491: 1972).f.6 The mater ia l shall also comply with th erequirements given in Table 1.5 PACKING5.1 Unless otherwise agreed to between the pur-chaser and th e vendor, the material shall bepacked in clean, sound and new high densitypolyethylene HOPE) woven bags or A-twill jutebags se IS 1943 : 1964) lined with polyethylene.The mouth of each bag shall be either machinestitched or rolled-over and hand stitched.5.2 The material may also be packed in smallercontainers lined w t paper or polyethylene whichin turn shall have an outer protective packing.6 MARKING6.1 Each container shall be suitably markedlprinted with an indelible insoluble ink so as togive th e following information:

a Name of the material,b Name and address of the manufacturer,c Batch or code number,d Date of manufacture,e Net mass of contents, andf ) Any other details required under theStanda .ds W,;ghtr a d Measur6s (PiJ k-agedCommodities Rulu J977/PFA Rules.


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,IS1005, 1912t l 1 ltlru ord arkinDetail. available with the Bureau of IndianStandards.7 SAM PL INGRepresentative sample of the material shall bedrawn and conformity of the material to therequirements of this specification shan be deter..mined by the method prescribed in S 4662 :1977.

8 TESTS8.1 Th e teats shall be camed out as prescribedin 4.2, f.3, f and in col 4 of Table 1.8.2 Q,aaUt 01 Be tUnici specified otherwise, pure cbemica1J shanbe employed in test. and di.tilled water SIIS 1070 : 1977 shall be used where the use ofwater as a r eagent intended.

NOTE - Pur e cb,micaJ. tball mean chemical. thatdo Dot Il aill impuntie which affect tbe re.ulta ofanalysis.

FIG 1 PHOTOMICROGRAPH0 MAIZE STARCH


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18 1005 .1992Table 1 Reqalremeat . lor Edible M.b:e Starda COl l l Ploar )

. Claus, 8 . 1 )

Note

IS 5887 Part 2 ) :19;6IS 5887 Part 3 ) :1976Cl12 1 3 ICl 14 of 18 6287 :I 1985Cl15 ,ICl16 J

CliO ) of IS 47061 (Part 2 :Cl 13 J 1978Cl 15 of IS 4706 Part 2) : 1978

Medlod of Teat Ref to(4)

CI 4 1ICl 5 I of IS 4706r(ar t 2 ) :197801 8 J

0

060

0 10

45 to 7 00 025

Absent in 25 gAbsent in 25 g

1 12 5

30 050 0

250 0

(9)12 50 20

Tin, ml/kg, MtutMercury, mg/kg, Max

Lead mg/kg, Copper, mg/kg, MaxZinc, mg/kg,

Arsenic, mg/kg, MaxSa/monilia

Acid insoluble al h (O D dry basi. ), percentby ma , MfaStarch on dry basi, ). percent by ma. .,MinProtein N x (\ 25) on dry baalt ), percentby mUI , MaJpH of aqueeus extractAlcoholic acidity (esprelted a t H.SO, )with 90 percent a lcohol , percent by mas.,

E. eoli

CbaftM ltedatlc 2)

Moisture , percent by mau, MaTotal ash (on dry b is) percent by ma l,MaJ

v)

ix)

iv)

Appendix H ofIS 9808: 1981xvi) Cadmium, mg/kg, Max - l S Annex BNOTE - Starch percent - 100 - Peoreie percent (on dry b as is ) + Fat, percent (on dry balia ) + Total ashpercent on dr y basi. ) + Sugar, percent on dry basis) + crude fibre, percent on dry buis ).

iii)

xiv)xv )

vi)vii)

viii)

x)xi)xii)xiii)

81 No. 1)

i)ii)

ANNEX A lause 2 )

LIST OF REFERRED INDIAN STAND4J\DSIS No. Till,

4706 Methods of test for edible Part 1 ) : 1978 starches and starch prod ucts :Part 1 Physical methods firstrevision)

IS No460 : 1985

1070 : 1977

1943 :2491 : 1972

4662 1977

Titl8Specification for test sievesSpecification for water forgeneral laboratory use secondrevision)Specification for A-twill jutebags ,eviSld )C od e for hygieni c c ondi ti onsfor food procening units firstr,vision)Methods of sampling of star-ches and starch products firslvision )

4706 Part 2 ) : 1978

5887 Part 2 ) : 1976

Methods of test for ediblestarches and starch products :Part 2 Chemical methods first, ;S;OIl )Methods for detection of bac-teria responsible fo r foodpoisoning: Part 2 Isolation,identification and enumerationof Escherichia eolifirst vision )


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IS 1005 .1912IS No. illl

5887 Methods for detection of bae- Part 3 ) : 1976 t u i a reapoDlible for foodp oi so ni ng : P ar t S Iso lat io n,an d identification of S lmo,.,llaan d Shi,,'la (first vision )

IS No.6287: 1985

98 8 : 9

illMethods for sampling and.analyaia for Ingar .confection..ery firdvision )Fish protem concentrate.

ANNEX B[ Tabl, 1, st No. xvi) ]METHOD FOR DBTERMlNA.TlON OF CADMIUM

IJ O S am pl e is dige st ed w it h HNO R.Sa., an dH.O I AU reactive metals are extracted from solution, after adjustment to about pH 9, withdithizone-CHCI,_ Cadmium is removed by stripping CHel. solution with dilute l and determined by Atomic Absorption Spectrophotometryat 228 8 om. .81 REAGENTS11-1.1 Nitric AcidLow in lead an d cadmium.8-1.2 H y d r o le l l P e r o s ld e50 percent,8-1.3 Citric AcidMonohydrate fine crystal.8-1.4 TIa) IDol Blue l a d l e .to rTriturate 01 g indicator in agate mortar with4-3 ml 0-05 .NNaOH. D ilut e to 200 ml with HIO.8-1.5 Dltbizolle S o l a d oB-l.5.1 Conclntral,d Solution 1 mg/ml )P re pa re 200 ml in CHCI,. Prepare fresh daily.B-1.6 CadmlalD StaDel.reI Solat-JoD8B-I.6.1 Stock Solution 10 m g/ml )Dissolve \ 0 00 g cadmium in 165 ml HOI inI-litre volumetric flask. Dilute to volume withH,O.

B l ~ 6 2 lnterm,diat, Solution 10 I g/ml )Dilute 10 ml stock solution with 2 HC l toone litre. P repare just before use.11-1.6.3 Working SolutioDilute 0, 1, 5, 10 .and 20 ml intermediate aolutlonto 100 ml with 2 N B C I 0, 01,05, 1-0, an d 2-0o g Cd/mi. respectively).B-2 APPAIlA.TVSB-2.1 Atomic Ah do Spectroplaotometer

4

With hollow-cathode c admium la mp and 10 cm.burner head for air-C.B. flame; wavelength228 8 nm, range 02 0 l8/ml.B-2.2 GlawThoroughly waahed with ao HNO. and rinsedwith waterv Beakers an d watchglasses should becovered during all operationB3 PROCEDURE8-3.1 DilestioDWeigh 500 g sam ple into 15 I beaker, Add seve-ra l boiling chips or beads, and cover. Carefullyadd 25 ml H N O f cover an d warm gently withflame to initiate reaction. When reaction subsides.add 25 ml HNOSb warm again, and continueuntil lOamI HNO, has been added. Alternatively, ad d 100 ml HNO. al l at once. with caution,an d let it stand at room temperature overnight.)Heat until most nitrous ozide fumes have evolved;control excessive frothing by cooling or quenchingwith H.O from wash bottle. Only some cellulosean d fatty materials, if any, remain undissolved.To remove any fat visible in hot solution, proceedas follows:Cool beaker in ice, and decant clear aqueoussolutio n from coagulated oils an d solids throughglasswool pa d into l-Iitre beaker. Add 100 mJ HIDto 15.liue b ea ke r with fat, heat, swirl vigorously to rinse fat, c hi n, an d filter as before.Wash funnel and glasswool pa d with about20 ml H,O.Add 20 ml H.SO, to sample, d il ut e to about 300ml with H.O. and evaporate over flame untilcharring begins. When charring becomes extensive, cautiously ad d 50 percent HI OI 1 ml at atime. Let reaction lubtide before adding nextportion of oxidant, an d do not add greater tban1 ml at a time. Continue additions of HIO. untillolution is colourleu_ Heat vigorously to SO,fumes, adding more HaO l required to r emo vechar. Heat vigorously to expel excess HI OI Coolcolourless digest to room temperature.Prepare reagent btaDk of 100 ml HNO.. 20 mlH.SO., and aame amountl of H. O as added to-


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sample. Cautiously add lame amounts of 50 percent H,O as above, and remove aU HNO. fromblank. Carry blank through lame operations assample.8- .2 EstraetlollAdd 2 g citric acid to cooled digest and cautiouslydilute to about 25 ml with IIsO. Add 1 ml thymolblue indicator and adjust to about pH 8-8 byslowly addiog NH OH while cooling in ice bathunti l solution changes from yellowish green togreenish blue. Transfer to 250 ml separator,using lItO. and dilute to about 150 ml.Cool solution, and extract with two S-ml portionsconcentrated dithi:rone solution, shaking for 1 to 2minutes each time. Continue ex tract ion with 5 mlportions d ilu te d ith izone solution unti l last 5 mportion of dithizone extract , hOWl no change incolour. Combine dithizone extracts in 125 mlseparator; wash with 50 ml HaO. and transfersolvent to another 125 ml separator . Wash thewater extract with 5 m CHCI. and add this todithizone extracts. Add 50 ml 02 N HOI to

IS 100511 2combined dithizone cauaetI, shake vigorously for1 minute, and let layers separate; discard dithizonelayer. Wash aqueous solution with 5 ml OHCand discard CHOl.. QJ1antitatively transfer aque..QUS solution to 400 ml beaker, add boiling chips,and evaporate carefully to dryness. Carefully rinsedown sides of beaker with 10-20 ml RIO andagain evaporate to dryness.11-3.:4 Set instrument to previously establishedoptimum condit ions, uling air-OtH, oxidizingflame and 228 8 nm resonant wavelength. Dissolve dry residue in 50 ml 2 N HOI and determine Absorption of sample and tandard solutionagainst 2 N HOI as blank. Flush burner with H.Qbetween readings. Use scale expansion controls toobtain 4..10 expansion, as convenient. Determinecadmium from curve of Absorption againstcadmium p ml.Cadmium ml/kg -

( g Cd/ml) X ( ml 2 N HOl g sample)For concentrat ion> 2 0 ,g Cd/ml, dilute soJu..tiona with NHal

5


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Stalll a artThe use the Standard arkis governed by the provisions of the aueau 01 IndianS anJizrtb Act 1986 and the Rules and Regulations made thereunder The Standard Mark onproducts covered y an Indian Standard conveys the assurance that they have beenproduced to comply With the requirements of that standard under a well defined system ofinspection testing and quality control which is devised and supervised y DIS and operatedby the producer Standard marked products are also continuously checked by DIS for con-Cormity to tbat standard as a further safeguard Details of conditions under which a licencefor tbe use of the Standard Mark m y be granted to manufacturers or producers may beobtained from the Bureau of Indian Standards


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EdibleMaizeStarch is-1005 1992