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钠标准溶液,7440-23-5,1000ug/ml in H2O
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钾标准溶液,7440-09-7,analytical standard ,1000ug/ml in 1%HCl
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钼标准溶液,7439-98-7,1000ug/ml in H2O
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硫标准溶液,7757-82-6,1000ug/ml in H2O
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六价铬标准溶液,7440-47-3,1000ug/ml in H2O
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5种阳离子混标(钠离子,铵离子,钾离子,镁离子,钙离子),1000μg/mL in H2O,不确定度:1%
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化学需氧量 (COD)-铬标准溶液,1000μg/ml 邻苯二甲酸氢钾 in H2O
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亚硝酸盐标准溶液,1000ug/ml in water
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硅酸根标准溶液,1000ug/ml in 0.05mol/L NaOH
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硝酸盐氮标准溶液,1000ug/ml in Water (20℃)
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