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4种阴离子混标(氟离子,氯离子,硫酸根,硝酸根),100μg/ml in H2O(不确定度 2%)
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4种阴离子混标(氟离子,氯离子,硫酸根,硝酸根),1000μg/ml in H2O(不确定度 1%)
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水质高锰酸盐指数标样,2.61-5.91(mg/L) in H2O(稀释后)
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Thermo Scientific™ ProWeigh™ Preweighed Filters for Gravimetric Analysis
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4种阳离子混标(钠离子,铵离子,镁离子,钙离子),100μg/mL in H2O
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4种阴离子混标(氟离子、氯离子、硝酸盐氮、硫酸根),100μg/ml in H2O(uncertainty 2%)
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钾标准溶液,7440-09-7,analytical standard ,1000ug/ml in 1%HCl
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氯化钠滴定溶液标准物质,7647-14-5,0.1M in H2O(20℃)
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确效用标准水 10000ppm Standard for volumetric Karl Fischer Titration 1 g ≙ 10 mg H₂O apura®
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确效用标准水 1000ppm Standard for coulometric Karl Fischer Titration 1 g ≙ 1 mg H₂O apura®
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