Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure 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.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 7044 (1973): Method for determination of sodium chloritecontent in textile materials [TXD 5: Chemical Methods ofTest]

IS : 7044 - 1973

Indian Standard METHOD FOR

DETERMINATION OF SODIUM CHLORITE CONTENT IN TEXTILE MATERIALS

Chemical Methods of Test Sectional Committee, TDC 5

Chalman

DR P. C. MEHTA

Representing

Ahmedabad Textile Industry’s Research Association, Ahmedatad

Members

Dn AJI’r SINGH SHRI S. P. KAPUR ( Alternale)

Ministry of Dcfence ( DGI )

DR S. M. RETRADET Cotton Technological Research ( ICAR ), Bombay

Laboratory

SICRI B.V. kIATT Ahmedabad Manufacturing and Calico Printing Co Ltd, Ahmedabad

SHRI K. G. SH.IH ( Altmnte ) SHI~I K. S. BHUJ 4~~1 Office of the Textile Commissioner, Bombay SrrRI S. K. BOSE National Test House, Calcutta SHRI 13. U. CHAKRAVERW Superintendence Company of India ( Private ) Ltd.

Calcutta DR S. I;. DUs.41 Sandoz ( India ) Limited, Bombay D~mxron o~i‘ HAN~T,OO\~ Government of Tamil Nadu

SRRT K. RAM.~NGIWXI- (Al/err&e) SHRI M. D. Drsrr The Bombay Textile Research Association, Bombay SHRI M. H. DOSHT Silk & Art Silk Mills’ Association Limited, Bombay

DR C. J. SHAT~ ( Allernnfe ) DR A. S. DUW Indian Jute Industries’ Research ,Association,

Calcutta SnRl K. 13. KU!,KAR~I Textile Auxiliaries Manufacturers’ Association,

Bombay Association of Merchants and Manufacturers of

Textile Stores and Machinery, India, Bombay Ministrv of Defence ( R & D 1

’ SHRI M. G. HHARAQAvA (Alternate) Eh I<. I. NARASI~~I~AN Office of the Textile Commissioner, Bombay DR M. V. NIMKAR hlillowners’ Association, Bombay 1)~ 13. M. PA’rEti I.C.I. ( India ) Private Ltd, Calcutta

Srrnr K. S. SRINIVA~.~?~ (Alternate)

( Continued on page 2 )

@ Copyright 1973 INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act (XIV of 1957) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

IS : 7044 - 1973

( Continued from page 1 )

Members

SHRI GORDHAN~~AI H. PATET, DR JAI PRAKASH SHRI R. S. PRAYAG SHRI R. RAMAKRISHNAN SHRI N. S. SARAIYA SHRI B. I’. SENGUPTA

Representing

Shri Dinesh Mills Ltd, Baroda Textiles Committee, Bombay All India Handloom Board, Bombay Binny Limited, Madras The Bombay Textile Research Association, Bombay Inspection Wing, Directorate General of Supplies &

Disposals, New Delhi SHRI V. B. HAJEI.A (Alternate )

SHRI JAMNADAS K. SHAH Raipur Manufacturing Co Ltd, Ahmedabad SITRI R.C. SHAH Ahmedabad Textile Industry’s Research Association,

Ahmedabad SHRI N. S. SIDHU Directorate of Industries, Government of Punjab,

Chandigarh SHRI A. SU~RAMANIAN The Ahmedabad Millowners’ Association,

Ahmedabad DR R. V. R. SU~RANANIAN The Silk & Art Silk Mills’ Research Association,

Bombay SHRI S. SUNDARA~I Delhi Cloth & General Mills Co Ltd, Delhi

SHRI M. K. VRNI:OOPAL ( Alternate ) SHRI S. S. TRIVEIJI Ahmedabad Textile Industry’s Research Association,

Ahmedabad SHRI S. M. CHAKRA~ORTY,

Director ( Tex ) Director General, IS1 ( Ex-ofi& d4ember )

Secretary

SHRI D. R. KOHLI Deputy Director ( Tex ), ISI

Chemical Test Methods Subcommittee, TDC 5 : 14

Convene7

SHRI R. C. SnAH Ahmedabad Textile Industry’s Research Association, Ahmedabad

Members

SHRI R. S. AGAR~AL Ministry of Defence ( DGI ) SHRI A. K. SINGH ( Alternate )

DR ( KUXARI) M. D. BHAVSAR The Silk & Art Silk Mills’ Research Association, Bombay

SHRI K. S. BHUJAN~ DR S. N. GHOSE

Office of the Textile Commissioner, Bombay Indian Jute Industries’ Research Association,

Calcutta SHRI K. P. DAS ( Alternate )

SRRI G. R. KULKARNI SHRI N. S. SARAIYA SHRI K. M. SHAH

Wool Research Association, Bombay The Bombay Textile Research Association, Bombay Mafatlal Fine Spg & Wvg Co Ltd, Unit No. 4.

SHRI JANNADAS K. SHAH Bombay _- -

Raipur Manufacturing Co Ltd, Ahmedabad

2

IS : 7044 - 1973

Indian Standard METHOD FOR

DETERMINATION OF SODIUM CHLORITE CONTENT IN TEXTILE MATERIALS

0. FOREWORD

0.1 This Indian Standard was adopted by the Indian Standards Institution on 31 October 1973, after the draft finalized by the Chemical Methods of Test Sectional Committee had been approved by the Textile Division Council.

0.2 In the textile industry, the chlorite bleach is carried out either on closed jiggers or on closed reaction chambers and is generally used for bleaching polyester-cotton blends. The determination of sodium chlorite content of fabrics is important for process control. This method can be used for determining the add-on on the cloth before and after treatment. This method can also be used for determining the strength of chlorite bath at different stages, feeding bath and running bath, for determining the rate of consumption of chlorite during process.

0.3 Determination of sodium chlorite content on finished fabrics is also important especially when these are to be stored for long time before use. For determining sodium chlorite content on finished fabrics the method described in Appendix A may be followed.

0.4 In reporting the result of a test made in accordance with this standard, if the final value, observed or calculated, is to be rounded off, it shall be done in accordance with IS: 2-1960*.

1. SCOPE

1.1 This standard prescribes a method for determination of sodium chlorite content in textile materials during process.

2. PRINCIPLE

2.1 A small piece of fabric is put in distilled water and potassium iodide solution is added and acidified with acetic acid. The liberated iodine is titrated against standard sodium thiosulphate solution and the amount of sodium chlorite content is calculated on the basis of the oven- dry mass of the specimen.

*Rules for rounding off numerical values (wised).

3

is:7044-1973

3. SAMPLING

3.1 Test sample to determine the chlorite content of fabrics in a lot shall be selected so as to be representative of the lot.

3.2 Test Specimens-Draw at least 2 test specimens each weighing about 5 g from different portions of the sample under test.

4. APPARATUS

4.1 Flat-Bottom Flask or Beaker - 250 ml capacity.

4.2 Measuring Cylinder

4.3 Burette

4.4 Weighing Balance

5. REAGENTS

5.1 Unless specified otherwise, pure chemicals shall bc employed in tests and distilled water (see IS : 1070-1960” ) shall be used where the use of water as reagent is intended.

NOTE - ‘ Pure chemicals ’ shall mean chemicals that do not contain impurities which affect the test results.

5.2 Potassium Iodide Solution - 10 percent.

5.3 Sodium Thiosulphate Solution - O-1 N.

5.4 Acetic Acid - 25 percent ( v/u ).

5.5 Starch Indicator - 0.5 percent.

6. PRQCEDURE

6.1 Cut a test specimen weighing approximately 5 g and directly place it in the flat-bottom flask without weighing. Add 25 ml of distilled water and 15 to 20 ml of potassium iodide solution and acidify with acetic acid. Shake and then let the solution stand for ahollt 5 minlltes.

6.2 Titrate the liberated iodine with sodium thiosulphate solu;ion using starch indicator (see Note ). The end-point shall be taken when the blue colouration disappears. Note the volume of sodium thioslzlphate used.

NOTE-Determine the approximate end-point in a preliminary titration so that the starch indicator may be added just prior to reaching the end-point. In case the volume of sodium thiosulphatr consumed is too small, a lower concentration of sodium thiosulphatr shall be used.

*Specifiration for water, distilled quality ( revised).

4

IS : 7044 - 1973

6.3 Wash the test specimen in water and dry it to constant mass at 105 =t~ 3°C and determine its mass.

6.4 Similarly, test the other test specimens.

7. CALCULATIONS

7.1 Determine the percentage of sodium chlorite content by the following formula:

f’=; x0.226

where

P = percentage of sodium chlorite,

V= volume of sodium thiosulphate in ml (see 6.2), and

m = mass of the oven-dry test specimen in g (see 6.3).

8. REPORT

8.1 Report shall include the following information:

a) Percentage of sodium chlorite content, and

b) Number of specimens tested.

APPENDIX A ( Clause 0.3 )

DETERMINATION OF SODIUM CHLORITE CONTENT OF DRY SPECIMENS

A-l. ATMOSPHERIC CONDITIONS FOR CONDITIONING AND TESTING

A-l.1 Prior to test, the specimens shall be conditioned for 24 hours to moisture equilibrium in a standard atmosphere or 65 f 2 percent RH and 27 f 2°C temperature (see also IS : 196-1966* ).

A-2. PROCEDURE

A-2.1 Take the conditioned test specimen and determine its mass (m) accurately. Then follow the procedure as given in 6.1 and 6.2.

A-2.2 Similarly test at least one more test specimen.

A-2.3 Calculate the percentage of sodium chlorite content as given in 7.1 taking m as the mass of conditioned test specimen (see A-3.1).

*Atmospheric conditions for testing (revised ).

5

INDIAN STANDARDS

ON

CHEMICAL METHODS OF TEST FOR TEXTILES

IS:

199-1957

200-1969

244-1969

389-1952

1039-1956

1185-1957

1349-1964

1383-1960 1390-1961

1560-1962

1582-1968

1689-1960

1967-1961 2350-1963

.2369-1967 2969-1964 3429-1966

3430-1966

3456-1966

4202-1967

4203-1967

4390-1967

5151-1969

5152-1969

5449-1969

Estimation of moisture, total size or finish, ash and fatty matter in grey and finished cotton textile materials

Copper number of cotton textile materials (Jirst revision)

Viscosity (or fluidity) of solutions of cotton and regenerated celluloses in cuprammonium hydroxide (J;rst revision )

Estimation of small quantities of sulphuric acid and hydrochloric acid in cotton materials

Estimation of small quantities of copper, iron, manganese, chromium and zinc in proofed cotton faorics

Relative wetting power of wetting agents

Wool fibre content of raw wool ( revised)

Scouring loss in grey and finished cotton textile materials

pH value of aquesus extract of textile materials

Estimation of carboxylic acid groups in cellulosic textile materials Scouring loss in silk textile materials

Barium activity number of cotton texti!e materials

Estimation of residual starch in cotton fabrics after desizing

Estimation of residual chlorine in cotton textile materials Absorbency of absorbent textile materials (_/irst revirion )

Added oil content of jute yarn and fabrics

Solubility of wool in alkali

Solubility of wool in urea-bisulphite solution

Water soluble matter of textile materials

Chloride content of textile materials

Sulphate content in textile materials

Ether soluble matter in textile materials

Evaluating the relative efficiency of wetting agents for mercerisation

Benzene-methyle alcohol soluble matter in textile materials Water soluble chromate in textile materials