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BS 5551-4.1.1:1981
M00000504
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BS 5551-4.1.1:1981 Fertilizers. Chemical analysis. Determination of nitrogen. Nitron gravimetric method for determination of nitrate nitrogen
standard by BSI Group, 11/30/1981
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Reference method applicable to all fertilizers.Cross References:
BS 1583
BS 1792
BS 3978
BS 5309:Part 1
BS 5309:Part 4