Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक 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. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS (1987): Methods of chemical analysis of misch metal, Part 4: Determination of aluminium [MTD 7: Light Metals and their Alloys]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

2

3

4

5 Indian Standard IS : 5425 ( Part 4 ) METHODS OF CHEMICAL ANALYSIS OF MISCH METAL PART 4 DETERMINATION OF ALUMINIUM Methods of Chemical Analysis of Non-Ferrous Sectional Committee, SMDC 34 Chairman DR CH VENKATESWARLU Members Bhabha Atomic Representing Metals Research Centre, Bombay SHRI 1. BANERWE Steel Authority of India Ltd ( Durgapur Steel Plant ), Durgapur SHRI A. C. MALLICK ( Alternate ) CHEMIST & METALLURGIST, Ministry of Transport ( Department of NORTHERN RAILWAY, LUCKNOW Railways ) ASSISTANT RESEARCH OFFICER ( MET )-2 RDSO, LUCKNOW ( Alternate ) SHRI D. P. JAIN Saru Smelting Pvt Ltd, Meerut SHRI R. D. RASTOGI ( Alternate ) SHRI A. M. KAMADE Kamani Metals and Alloys, Bombay SHRI B. P. MAHAPATRA Directorate General Ordnance Factory, Calcutta SHRI R. N. ROY ( Alternate ) SHRI D. D. MISHRA Hindustan Aluminium Corporation Ltd, Mirzapur SHRI K. C. MODI ( Alternate ) SHRI R. N. MISHRA Hindustan Copper Ltd, Khetri Nagar DR L. P. PANDEY National Metallurgical Laboratory ( CSIR ), Jamshedpur SHRI K. K. GUPTA ( Alternate ) DR D. C. PRASHAR Natio;;llhFhysical Laboratory ( CSIR ), New SHRI J. RAI ( Alternate ) SHRI B. R. RAI Cominco Binani Zinc Ltd, Binanipuram SHRI N. SRINIVASAN (Alternate ) SHRI M. RAE National Test House, Calcutta SHRI A. K. DUTTA GUPTA ( Alternate ) 0 Copyright 1987 BUREAU OF INDIAN STANDARDS ( Continued on page 2 ) 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 permissionof the publisher shall be deemed to be an infringement of copyright under the said Act.

6 k3 : 5425 ( Part 4 ) - i987 ( Continued from page 1 ) Members Representing DR J. RAJARAM Essen & Co, Bangalore SHRI S. K. SUNDARAKRISHNAN ( Alternate) DR B. R. L. Row Hindustan Zinc Ltd, Udaipur SHRI B. L. GUPTA ( Alternate ) SHRI A. K. ROY Bharat Aluminium Company Ltd, New Delhi SHRI K. P. MIJKHERIEE ( Alternate ) SHRI R. K. SAWANT Indian Standard Metal Co Ltd, Bombay SHRI N. R. MANIAR ( Alternate ) SHRI P. D. SHARMA Hindustan Copper Ltd, Ghatshila SHRI D. C. MATHUR ( Alternate ) SHRI J. R. SIL MinistBro;-ainance ( India Government Mint ), SHRI R. P. SINGHAL India;fx&ing and Refining Company Ltd. SHRI A. M. DOSHI ( Alternate ) SHR~ B. MUKHERJI, Director General, BIS ( Ex-officio Member ) Director ( Strut & Met ) Secretaries SHRI JAGMOHAN SINQH Deputy Director ( Metals ), BIS SHRI M. L. SHARMA Assistant Director ( Metals ), BIS 2

7 Indian Standard IS : 5425 ( Part 4 ) METHODS OF CHEMICAL ANALYSIS OF MISCH METAL PART 4 DETERMINATION OF ALUMINIUM 0. FOREWORD 0.1 This Indian Standard ( Part 4 ) was adopted by Indian Standards Institution on 16 January 1987, after the draft finalized by the Methods of Chemical Analysis of Non-Ferrous Metals Sectional Committee had been approved by the Structural and Metals Division Council. 0.2 Misch metal is an alloy of rare earth metals and is used for improving the strength, fluidity and other properties of cast iron, steel, aluminium, magnesium and nickel alloys to which it is added. Chemical analysis of misch metal is covered in parts. In this part, a method for determination of aluminium has been covered. Other parts are: Part 1 Determination Part 2 Determination Part 3 Determination Part 5 Determination of cerium of rare earths of iron of carbon 0.3 In reporting the result of a test or analysis 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 : *. 1. SCOPE 1.1 This Indian Standard ( Part 4 ) covers the method for determination of aluminium in misch metal as specified in IS : f. 2. QUALITY OF REAGENTS 2.1 Unless specified otherwise, analytical grade reagents and distilled water ( see IS : $ ) shall be employed in the test. *Rules for rounding off numerical values ( revised for misch metal. $Specification for water, for general laboratory use ( second revision ). 3

8 IS : 5425 ( Part 4 ) DETERMINATION OF ALUMINIUM BY SPECTROPHOTOMETRIC METHOD 3.1 Outline of the Method - Aluminium is extracted as its oxinate at ph 5 0 keeping iron complexed with 0-phenanthroline. The absorbance of the extracted aluminium oxinate is measured at 395 nm. 3.2 Reagents Dilute Hydrochloric Acid - 1:l ( V/V ) Hydroxylamine Hydrochloride - Dissolve 10 g of the reagent in 100 ml water O-phenanthroline - Dissolve 1 g of the reagent in a litre of water Acetate Buffer - Mix 70 ml of sodium acetate solution ( 0 2 M ) with 30 ml acetic acid ( 0 2 M ) Oxine Solution - Dissolve 0 5 g in 50 ml of chloroform as and when required Standard Aluminium Solution - Dissolve g of cleaned aluminium foil ( purity = 99 9 percent ) in 25 ml dilute hydrochloric acid ( 1:l ). Evaporate it to dryness on a water bath. Add 1 ml of concentrate hydrochloric acid ( rd = 1 16 ) and make up the volume to 500 ml with water. ( 1 0 ml contains 1 0 mg of Al ). This solution is further diluted as and when required to give 10 p g of Al/ml. 3.3 Procedure Weigh g of the sample into a beaker. Add 50 ml of dilute hydrochloric acid and dissolve the sample. Make up the volume to 200 ml in a volumetric flask Take 1 0 ml of the sample solution from in a beaker and add 5 ml of hydroxylamine-hydrochloride and 20 ml of a O-phenanthroline. Adjust the ph to 4 0 and transfer the solution to a loo-ml separating funnel Add 10 ml of buffer followed by 10 0 ml of oxine solution Shake for 3 minutes., run the chloroform extract into a small stoppered dry flask contatnmg 1 g of anhydrous sodium sulphate and shake to remove the droplet of water Measure the absorbance of chloroform solution at 395 nm against a reagent blank prepared by following to Take aliquots of standard aluminium solution and follow to Plot the absorbance against the amount of aluminium taken. 4

9 IS : 5425 ( Part 4 ) Calculation.. M Alummlum, percent = 100 where M = mass of aluminium in pg obtained graph. from the calibration

10 INTERNATIONAL SYSTEM OF UNITS ( SI UNITS ) Base Units QUUtl t ity Unit Symbol Length metre m Mass kilogram kg Time second S Electric current ampere A Thermodynamic temperature kelvin K Luminous intensity candela cd Amount of substance mole mol Supplementary Units Quantity Unit Symbol Plane angle radian rad Solid angle steradian sr Derived Units Quantity Unit Symbol Definition Force newton N 1N = 1 kg.m/sa Energy Power joule watt J W 1J 1w = 1 N.m = 1 J/s Flux weber Wb 1 Wb = 1 V.s Flux density tesla T 1T = 1 Wb/m Frequency hertz HZ 1 Hz = 1 c/s(s-l) Electric conductance siemens S 1s = 1 A/V Electromotive force volt V 1v = 1 W/A Pressure, stress Pascal Pa 1 Pa = 1 N/m*

11