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A further part of BS 1728 Method for analysis of aluminium and aluminium alloys has just been published by the British Standards Institution. The addition to the series is Part 25 Titanium (spectrophotometric chromotropic acid method) which covers the determination of titanium in the range 0.005 to 0.30 per cent. It is identical in purpose and range of titanium content with Part 13 of the series, which has been rendered obsolete by analytical progress and withdrawn. Part 25 is identical with ISO 1118.