China Determination of nia GB Standards Search Result |
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GB/T 14668-1993 Air quality--Determination of ammonia--Nessler’s reagent colorimetric method - 英文版 |
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GB/T 14679-1993 Air quality--Determination of ammonia--Sodium salicylate-sodium hypochlorite spectrophotometric method - 英文版 |
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GB/T 13266-1991 Water quality--Determination of the acute toxicity of substance to Daphnia (Daphnia magna straus) - 英文版 |
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GB/T 5474-1985 Phenol-formaldehyde mouldings--Determination of free ammonia and ammonium compounds--Colorimetric comparison method - 英文版 |
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GB/T 505-1965 Determination of mercaptan-sulfur in engine fuels (ammonia-copper sulfate method) - 英文版 |
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