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水中硝酸根成分分析标准物质,500μg/ml ±1% (20℃)
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水中氨氮成分分析标准物质,100μg/ml ±2% (20℃)
-
水中氨氮成分分析标准物质,500μg/ml ±1% (20℃)
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硝酸盐氮标准溶液,1000ug/ml in Water (20℃)
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苯酚标准溶液,1000ug/ml in 0.02mol/L NaOH
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银标准溶液,analytical standard ,1000ug/ml in 1%HNO3
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钯标准溶液,7647-10-1,1000ug/ml in 2.0 mol/L hydrochloric acid
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(As,Sb,Li,Mn,Mo,Ni,P,K,Sc,Na,S)多元素混合标准溶液(混标)
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水中硝酸根成分分析标准物质,1000ug/ml ±1% (20℃)
-
水中硫酸根成分分析标准物质,1000μg/ml ±1% (20℃)
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