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深海的眼泪

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Preparation of Standard Solutions.Stock standard  phosphate solution was prepared by dissolving 0.1000 g of  oven-dried analytical reagent grade disodium hydrogen phosphate, Na2HP04, in 100 mL of deionized water and was stored in a polyethylene volumetric flask. Working solutions of lower phosphate concentrations were prepared daily by diluting the stock solutions.

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jiangguofeng

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深海的眼泪: 金币+4 2016-10-20 07:14:02
深海的眼泪: 金币+2 2016-10-22 10:05:54
标准溶液的配制。
0.1000克烘干的分析纯试剂级磷酸氢二钠和Na2HP04溶解于100毫升去离子水中并保存在一个聚乙烯量瓶中配制成磷酸盐标准储备溶液。 通过稀释这种储备溶液进行低浓度磷酸盐工作溶液的日常配制
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