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总氮标准溶液
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正十一烷标准溶液,1120-21-4,analytical standard ,1000ug/ml in methanol
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银标准溶液,analytical standard ,1000ug/ml in 1%HNO3
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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℃)
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水中氨氮成分分析标准物质,500μg/ml ±1% (20℃)
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磷酸根离子标准溶液,7558-79-4,1000μg/ml in Water (20℃)
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氨氮标准溶液,500mg/L in H2O
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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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