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Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a
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access to information under the control of public authorities, in
order to promote transparency and accountability in the working of
every public authority, and whereas the attached publication of the
Bureau of Indian Standards is of particular interest to the public,
particularly disadvantaged communities and those engaged in the
pursuit of education and knowledge, the attached public safety
standard is made available to promote the timely dissemination of
this information in an accurate manner to the public.
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है”ह”ह
IS 13864 (1993): Wheat - Determination of sedimentationindex -
Zeleny test [FAD 16: Foodgrains, Starches and Readyto Eat
Foods]
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IS 13864: 1993ISO 6529 : 1992
~ - amrr~ ~~ IDa Cfiffi - ~~Indian Standard
WHEAT - DETERMINATION OF SEDIMENTATIONINDEX - ZELENY TEST
UDC 633"11: 543·86
@ BIS 1993
BUREAU OF INDIAN STANDARDSMANAK BHAVAN 9 BAHADUR SHAH ZAFAR
MARG
NEW DELHI 110002
Decembsf 1993 Price Group 2
-
AMENDMENT NO. 1 SEPTEMBER 1995TO
IS 13864: 1993 WHEAT - DETERMINATION OFSEDIMENTATION INDEX -
ZELENY TEST
( National Foreword, under 'CROSS REFERENCES' ) - Substitute'IS
4333(Part 2): 1977' for 'IS 4333(Part 2): 1967'.
(FAD 16)Reprography Unit. B15. NewDeihl, Ind,.
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Foodgrains and Foodgraln Industries Sectional Committee, FAD
16
NATIONAL FOREWORD
This Indian Standard which IS Identical with ISO 5529 '1992
'Wheat - Determination ofsedimentation Index - Zeleny test' Issued
by the International Organization for Standardization( ISO) was
adopted by the Bureau of Indian Standards on the recommendation of
the Foodqrarnsand Foodqram Industries Sectional Committee (FAD 16),
and approval of the Food andAgriculture DIVISion Council.
In t"e adopted standard certain terminology and conventions are
not Identical With those usedIn the Indian Standards, attention IS
drawn spscrallv to the followrnp,
a) Wherever the words 'International Standard' appear referring
to this standard, theyshould be read as 'Indian Standard'
b) Comma ( , ) has been used as a decimal marker while In Indian
Standard. the currentpractice IS to use a point ( . ) as a decimal
marker
CROSS REFERENCI:S
ISO 565 . 1990
ISO 712 . 1985
ISO 648 . 1977
In this adopted standard, reference appears to certain
International Standards for which IndianStandards also exist The
corresponding Indian Standards which are to be substituted In
theirplace ore listed below along WIth their degree of equivalence
for the editions indicated:
tntemsttonsl Standard lndtsn Standard Degree
ofCorrespondence
Technicallyequivalent
IS 460 1985 Specrticatron for test sieves:Part 1 Wire doth tes,
Sieves, Part 2 Perforatedplate test sieves
IS 1117' 1975 One mark pipettes (fIrst Technicallyreviston v
equivalent
IS 4333 ( Part 2 ) : 1967 Method of analysts Technicallyfor
Ioodqrams Part 2 MOisture equivalent
The technical committee responsible for the preparation of this
standard has further reviewed theprovisions of 'ISO 2171 1980
Cereals. pulses and derived products - Determination of ash'and has
decided that It IS SUitable for use In conjunction With this
standard.
In reporting the results of a test or analysts made In
accordance With this standard. If the finalvalue, obseryed or
calculated IS to be rounded off, It shall be done In accordance
WithIS 2 1960 Rules for rounding off numerical values ( revtsed
)'.
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IS 13884: 1113ISO 6629 : 1892
Indian Standard
WHEAT - DETERMINATION OF SEDIMENTATIONINDEX - ZELENY TEST
1 Scope
This lnternatronal Standard specifies a methodknown as the
Zeleny sedimentation tesl for assessrnq one of the factors
delerrmrunq the qualityof wheat with regard 10 the bakmq strength
of theflour which can he made from It
The method IS applicable only to Tttttcum aesllvu'/lwheal
2 Normative references
The followlllg standards contain pi ovrsions whichthrough
reference III thrs text constitute provisionsof thrs Intel national
Standard At the limp of publication the editions mdicated were
valid All standards are subject to revision and parties
toagreements based on thrs International Standardare encouraged to
mvesuqate the posvrbrhty of applying Ihe most I ecent editions of
the standards IIIdrcated below MembE'rs of lEe and ISO
marntamregisters of currently valid Internallonal Standards
ISO 565 1990 Test sieves - Metal wire cloth perforated metsl
plate ena eleclroformed sheet Nom-mal sizes of opellmg~
ISO 648 1977 Laboratory glasswale - One markptpette»
ISO 712 1q8~ Cereals alld cet eet products Detpr-mmat/on of
moisture content (Rouun» referencemethod)
ISO 21711980 Cereals pulses Rnd denved products- Determmatloll
of ash
3 Definition
For the purposes of this International Standard thefollowing
definltron applies
3 1 sedimentation Index The number rndicatmg thevolume expressed
in rrullrlnres of the sedunent ob
\amed ll00ef s\}et.\fled 1:00dl\\Or.s If 00) a S\lSpenSlOllof
test flour prepared from the wheat in a lactic acidsolution
4 Principle
Suspension of a test flour prepared from the wheatunder
specrflad gnndlllg and sievmq condrtions IIIa lactrc acid sotunon
In the presence of bromophenol blue After specified shaklllg and
rest timesdetermmauon of the volume of the deposit resultmqfrom the
sedimentation of the flour particles
5 Reagents
Use only reagenls of recognized analytical gradeunless otherwise
specrhed
Use distilled water or water of at least equivalentpurrty
contarrunq less than 2 mglkg of rnmeral malter
5 1 Sedimentationtest reagent
5 1 1 Lactic acid solution
Prepare a concentrated 85 % (V}/") lactic acid solution
containing not more than 40 mglkg or mmr-ralmailer
Drlule 250 ml or this concentrated solution to 1 litrewith water
Boll the dilute solution under reflux for6 h (see nole 1)
Titrate an aliquot portion of thrs solution wrth potassium
hydroxide solullon (for 5 ml of the lacuc acidsolulron about 28 ml
of 0 5 molll potassium hydroxIde sotunon IS necessary) The
concentration roundshall be between 2 7 molII and 2 8 molll
NOTE 1 Concenlrated lacllc acid contains associatedmolecules
which on dilution drssocrate slowly 10a certamequuionum BOIling
accelerales lh,s dissolutron processWhlLh IS essential In order 10
obtain reproducrbtesedirnentauon values
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IS 13884 : 1993ISO 6629 : 1992
5 1 2 Preparation 01 test reagent
Thoroughly mix 180 ml of the diluted laclrc acid soluuon (5 1)
with 200 ml of between 99 % (VI V) and100 % (VI V) propan 2 01
contammq not mal ethan40 mg/kg of minerai matter and make up to1
000 ml with waler
Keep In a stoppered flask and do not use the reagent until It
has ber-n left to stand for 48 h
5 2 Bromophenol blue solution
Dissolve 4 mg or bromophenol blue In 1 000 ml orwater
6 Apparatus
usuat laboratory apparatus and In pai trcular therollowlng
61 Test mill or an appropnate typpll (seeannex A)
6 2 Woven melal wire sieve" In accordance withthe spectncahons
of ISO 565 haVing a 'nominal aperturc size or 150 11m 200 mm In
diameter movedby an appropriate automatic vibration device or
eccentncrty 50 mm and rotalional frequency200 min 1
63 Perforated metal plate sieve with slots 1 mmwide
6 4 Flat-boltom cylinders of 100 ml capacitygraduated In
rrulhhtres with a distance of lAO mm 10185 mm betwpE'n the bottom
and the 100 ml markand equipped with ptastrc or glass stoppers
65 Cylinder shaker flttE'd with a lime SWitch andproviding a
shaking f1equency of 40 min 1 each
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84 Test portion
Weigh \0 the nearest 005 g 32 g of the tl'sl flour(83)
NOTE2 II there Is any reason \0 think that the morstureconlenl
of the test flour IS outside the range 13 0 0 (m m)10 15 % (m m)
determine ItS value In accordance withISO 712 Ihen weigh a quantrty
of Ihe 11'.1 flour carrespcndmq 10 3 20 g ± 0 05 g at 14 % (m m)
morvture content (I e 2 75 g -t 004 g of dry mailer)
8 5 Determination
851 Carry out Ihe sedunontauon procedur I'specnled In 8 5 2 to 8
5 6 twice on separate testportions taken from the same te st flour
(8 3)
8 52ThI' operations specified In 8 5 3 to 856 shallbe carried
out under normal lighting conditions outof direct sunlight
The tune laken to pour each rl'agent Into the cynnder (see 8 5 3
and 8 5 4) shall not exceed 15 s
853 Place Ihe test portion (84) In a qraduatedcylinder (6 4)
Add 50 ml of Ihe bromophenol blue solution (52) tothe test
portror Close the cylinder With a stopperand holding the cylinder
In a horizontal positronshake It left and right through
approximately18 em 12 times In each direction over approximately5
s
854 Place the cylmder In the shaker (65) andstart the stop dock
(67, and the shaker After5 min remove the cylinder Irorn the shaker
and addto Its contents 25 ml of the sedimentanon test reagent (5
1)
Replace thO' cylinder and contmue the shaking
855 After a total time of 10 min remove the cvnnder From Ihl'
shaker and place It In an upnqht posrtron
856 Leave lhe contents of tile cylmder to stand Forexactly 5 min
and then noll' the volume of the dePOSit to the nearest 0 5 ml
9 Expression of results
The number indicating the volume expressed Inmtlhhtres of the
deposit noted III accordance With8 56 represents Ihe sedunentanon
mdex
Take as Ihe result the anthrnetrc mean of the resullsof two
determinations (8 5 1) provided Ihat their dll
3
IS 13884 : 1993ISO 5529: 1992
Ference does not exceed 2 umts II their differencedoes exceed 2
units discard the results 01 the Iwodeterminations and repeat the
operations given In84 and 85
Report the result as a whol .. number
10 Precision
101 Repeatability
The absolute difference between two IndependenlSingle tesl
results obtained using the same methodon Identical test matenal In
the same laboratory bythe same operator usmq the same equipment
Withina short Interval 01 time should not be greater lhan2
units
102 Reproducibility
The absolute difference between two Single lesl resuits obtained
uSing the same method cn Identicaltest material In different
laboratories With differentoperators USing different equipment
should not begreater than
2 (absolule value) for a sedimentation Index ofless than 20
10 % (rei alive value) of lhe mean value for asedimentation
Index of greater than 20
11 Test report
The test report shall speclly
the method In accordance With which samplingwas earned oul (II
known)
the type of mill used
the method used
the test I esult(s) obtained and
If fhe repeatabrhty has been checked the finalquoted result
obtained
It shall also mention all operating details not speerfied In
this Inlernalional Standard or regarded asoptional together wuh
details of any mordents whichmay nave Influenced the result
The tesl report shall Include all informationnecessary for the
complete Identification 01 thesample
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IS 13884 : 1113ISO 6621 : 1182
Annex A(normative)
Grinding and sieving of the sample
A.1 General
The sample speclned In A 2 10 A 6 as approprlale,freed from
Impurities, shall be ground under Ihecondilions specified below
according 10 the type ofmill used
A.2 Mlag-Grobschro'mOhl. mill
Sample 100 g
Carry out a first grinding with the rolls 1 rnrnapart and at a
rotalional frequenry of about30 min I
Regrind all the material obtatneq from Ihe firstgrinding, but
With the rolls 0,1 rnrn apart, thenrepeat thrs regrinding procedure
a further threetunes
Using a sieve (6 2) haVing a nominal aperturesize of 150 urn,
sieve the product of these threesuccessive grlndlng~ for 5 min
A.3 Brabender-Sedlma' mill
Sample 100 g
Set the timing device of the mill at 3 min
- Carry out the grinding With a gap of 1 rnm be-tween the feed
loll and the first grinding roll anda gap of about 05 mrn between
the other grind-Ing rolls at a rotational frequency of about1000
min 1
NOTES
3 On Ihe Brabender-Sedlmat mill, the roll gaps andspeed are nol
adjustable These details are given 10 en-sure Ihat the rolls are
not badly worn and Ihal the motorruns at the correct speed
4 The products 01 the mllhngpass directly Into the Siller
II Ihe mass of Ihe ground product IS less Ihan10 g continue
Sieving untrl Ihal quantity IS ob-tained
4
A.4 Tag-Heppens'a" mill
Sample 200 g
- Carry oul a first grinding With the rolls 0,6 mmapart and at a
rotatronal frequency of about30 min I
Regrind all the material obtained from the firstgrinding with
the same gap between Ihe rolls,then repeat this regnndlng proredure
a furtherthree times
USlI1g a sieve (6 2) haVing a nominal aperturesize of 150 11m
sieve Ihe product of Ihe five sue-ceSSiVE' gllndlngs for t 5
min
A.S Strand-Roll mill, model SRM
Sample 150 g
Carry out a firsl grinding With the rolls 0,8 rnmapart and al a
rotationat frequency of about30 min 1
Regrind all the material obtained from the firslgrinding wuh the
same gap between Ihe rolls,then repeal this regrinding procedure a
lurtherIhree times
U
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Stllldarel MarkThe use of the Standard Mark is JOveraed by the
provi.loQs of the BUUQII of II1d"'"
Standards Ac«, 1986 and the Rules and RegulatIons made
thereunder. The Standard Markon products covered by an Indian
Standard conveys the assurance that they have beenproduced to
comply wIth the requirements of that standard under a well defined
systemof Inspection, testing and quality control which IS devised
and supervised by BIS andoperated by the producer. Standard marked
products are also continuously checked byBIS for conformity to that
standard as II further SIIfeguard. Details of condttions underwhich
a licence for the use of the Standard Mark may be granted to
manufacturers orproducers may be obtained from the Bureau of Indian
Standards.
-
Bureau of Indian Standards
BIS IS a statutory mstnutlon estabhahed under tbe B~rlau.f
Indian Slallllilrd# Act, 198. topromote barmonoous development of
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COPyr1llhl
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permissron in writing of BIS This does not preclude the free use,In
the course of Implementing the standard. of necessary details, such
as symbols and SIzes, typeor grade desrgnatrons Enquiries relatmg
to copyrrght be addressed to the Director( Puhhcatrons } AIS
RefislOD of IndiaD Standard.
Amendments are Issued to standards as the need arrses 00 the
baSIS of comments Standardsare also reviewed perrodrcallv, a
standard along with amendments IS reaffirmed when such
reviewindicates that no changes are needed. If the review indicates
that changes are needed. It IS takenup for reviston Users of Indian
Standards should aseer tam that they are 10 possessron of thelatest
amendments or edmon by referrmg to the latest Issue of 'BIS
Handbook and 'StandardsMonthly Addrtrnns' Comment, on thrs Indian
Standard may be sent to BIS alVlnl the followmgreference
Doc No FAD 16 ( 356 )
AmudmeDts hs.d SIDce Publican••
Amend No Date of Issue
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