British Chemical Standard, BCS-CRM 460/2, is sold in bottles containing 100g chips graded 1700 - 250µm (10 - 60 mesh) for chemical analysis. Spectroscopic Standard, SS-CRM 460/2, 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 460/2 CARBON STEEL (Residual Series) NOTES ON METHODS USED CARBON All Analysts, except Nos. 3 and 5 determined carbon using high frequency combustion and infrared absorption. Nos. 4 and 8 calibrated with pure chemicals. Analysts Nos. 3 and 5 used non-aqueous titration according to B S 6200:3.8.2:1991. SILICON Analysts Nos. 1, 2, 3, 4, 5 and 8 used gravimetric methods. All Analysts, except No. 4, after dehydration with perchloric acid according to BS 6200:3.26.1:1995 (ISO 439-1994), Analyst No. 4 after dehydration with nitrosulphuric acid. Analysts Nos. 7 and 9 determined silicon by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES). No. 9 calibrated with pure metal. MANGANESE Analysts Nos. 1, 2, 7, 8 and 9 determined manganese using ICP-OES, Nos. 1 and 9 calibrated with pure chemicals. Analysts Nos. 3 and 5 determined manganese photometrically after oxidation with periodate according to BS 6200:3.18.2:1985 (ISO 629-1982). Analyst No. 4 used Flame Atomic Absorption Spectrometry (FAAS). PHOSPHORUS Analysts Nos. 1, 2, 7, 8 and 9 determined phosphorus using ICP-OES, Nos. 1 and 9 calibrated with pure chemicals. Analysts Nos. 3 and 5 determined phosphorus photometrically as phosphovanadomolybdate according to BS EN 10184:1992. Analyst No. 4 used a titrimetric method after precipitation as phosphomolybdate. SULPHUR All Analysts, except No. 3, determined sulphur using high frequency combustion and infrared absorption. Nos. 4, 8 and 9 calibrated with pure chemicals. Analyst No. 3 determined sulphur gravimetrically as barium sulphate. ALUMINIUM (TOTAL) All Analysts determined total aluminium using ICP-OES. Nos. 5 and 9 calibrated with pure metal. Analyst No. 3 used FAAS according to BS6200:3.1.4:1990 (ISO 9658-1990). ALUMINIUM (ACID SOLUBLE) Analyst No. 3 determined acid-soluble aluminium using ICP-OES, Nos. 3, 5 and 9 calibrated with pure metal. Analyst No. 3 after dissolution according to BS 6200:3.1.4:1990 (ISO 9658-1990). The other Analysts after dissolution procedures as follows:- Analyst No. 5, 1:1 hydrochloric acid and oxidation with nitric acid; Analyst No. 7, 1:1:2 hydrochloric and nitric acids and water; Analyst No. 8, 1:1 nitric acid and Analyst No. 9, a mixture of hydrochloric, nitric and hydrofluoric acids. Analyst No. 3 also determined the acid-insoluble aluminium using ICP-OES and obtained a mean value of 0.0039%. BORON All Analysts, except No. 7, determined boron photometrically with curcumin according to BS EN 10200:1992. Analyst No. 7 used ICP-OES. COBALT All Analysts, except No. 3, determined cobalt using ICP-OES. Nos. 5, 6 and 9 calibrated with pure metal. Analyst No. 3 used FAAS according to BS 6200:3.11.3:1997 (ISO 11652-1997). NIOBIUM All Analysts, except No. 3, determined niobium using ICP-OES. Nos. 5, and 6 calibrated with pure metal or metal oxide. Analyst No. 3 used a photometric method with 4-(2-pyridylazo) resorcinol after separation with phenylarsonic acid according to BS EN 10178:1989. LEAD Analysts Nos. 3, 5 and 6 determined lead using FAAS. Analyst No. 8 used ICP-OES. Analysts Nos. 3, 5, and 9 calibrated with pure metal. VANADIUM All Analysts, except No. 3, determined vanadium using ICP-OES. Nos. 5, 6 and 9 calibrated with pure chemicals. Analyst No. 3 used a photometric method with N- benzoylphenyl-hydroxylamine according to BS 6200:3.34.2:1989 (ISO 4942:1988). ANTIMONY Analyst No. 3 determined antimony using FAAS. Analyst No. 6 also used FAAS after separation of antimony with hydride generation. Analysts Nos. 7 and 9 used ICP- OES. Analysts Nos. 3 and 6 calibrated with pure metal. ZIRCONIUM All Analysts, except No. 3, determined zirconium using ICP-OES. Analyst No. 3 used a photometric method with arsenazo III.

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