British Chemical Standard, BCS-CRM 462/1, is sold in bottles containing 100g chips graded 1700 - 250µm (10 - 60 mesh) for chemical analysis. Spectroscopic Standard, SS-CRM 462/1, is sold as 38 mm diameter x 19 mm thick discs for spectroscopic analysis. Date of this edition: June 2019. (The current edition is available at www.basrid.co.uk) Page 2 of 2 BCS/SS-CRM 462/1 AUSTENITIC STAINLESS STEEL NOTES ON METHODS USED CARBON Analysts Nos. 1, 2, 4, 6, 7, 8 and 9 determined carbon by high frequency combustion/infrared absorption according to BS 6200: 3.8.3:1990*. Nos. 3 and 5 used non- aqueous titration according to BS 6200: 3.8.2:1991*. SILICON All Analysts determined silicon gravimetrically after dehydration with perchloric acid. MANGANESE Analysts Nos. 1 and 3 determined manganese using Flame Atomic Absorption Spectrometry (FAAS). Nos. 2, 4, 5, 6, 7 and 9 used photometric methods, all, except No. 7, oxidised manganese with periodate, No. 5 according to BS 6200: 3.18.2*. No. 7 oxidised with ammonium persulphate. No. 8 used Inductively Coupled Plasma - Atomic Emission Spectrometry (ICP-AES). PHOSPHORUS Analysts Nos. 1, 3, 4, 5, 7 and 9 determined phosphorus photometrically as phosphovanadomolybdate, Nos. 1, 3, 5 and 7 according to BS EN 10184: 1992†. No. 2 used a titration method after separation as phosphomolybdate. SULPHUR Analysts Nos. 1, 2, 4, 6, 7, 8 and 9 determined sulphur using high frequency combustion/infrared absorption, according to BS EN 24935: 1991†. No. 3 determined sulphur titrimetrically after combustion. No. 5 determined sulphur gravimetrically after chromatographic separation on an alumina column according to BS 6200: 3.28.1:1985*. CHROMIUM All Analysts determined chromium titrimetrically after oxidation with ammonium persulphate, No. 5 according to BS EN 24937:1991†. MOLYBDENUM Analysts Nos. 1, 2, 3, 4 and 9 determined molybdenum using FAAS. Nos. 5 and 7 determined molybdenum photometrically as the oxythiocyanate according to BS 6200: 3.19.1: 1985*. No. 8 used ICP-AES. NICKEL Analysts Nos. 1 and 4 determined nickel gravimetrically. Nos. 2 and 8 determined nickel cyanometrically. Nos. 3, 5, 7 and 9 determined nickel titrimetrically after separation with dimethylglyoxime. All, except No. 5, titrated with EDTA, according to BS EN 24938: 1990†. No. 5 dissolved the precipitate in dilute sulphuric acid, boiled with excess ferric sulphate, and titrated with dichromate (Analoid Method 62). COPPER Analysts Nos. 1, 2, 3, 4, 5 and 9 determined copper using FAAS according to BS EN 24943: 1990†. No. 7 determined copper photometrically with 2,2'-diquinolyl according to BS EN 24946: 1990†. * BS 6200: Sampling and Analysis of Iron, Steel and Other Ferrous Metals: Part 3, Method of Analysis, published by the British Standards Institution, 389 Chiswick High Road, London W4 4AL. BS EN Standards are European Standards published by the European Committee for Standardization (CEN) which have the status of British Standards and replace any equivalent BS6200 standards.

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