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520crazy

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[求助] 磷酸氢镁的检测。。。急。。。

最近做磷矿废水中回收镁,我们加入沉淀剂(氧化镁)后,得到的产物经过XRD分析大部分是磷酸氢镁,但是不知道它的具体含量多少,需要测产品的纯度,哪位知道如何检测磷酸氢镁的含量,急用,谢谢了。。
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yugijiang

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【答案】应助回帖

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soundhorizo: 金币+3, 感谢应助 ^^ 欢迎常来分析版 2012-07-05 10:47:17
520crazy: 金币+5, ★★★很有帮助 2012-07-11 16:48:53
是FCC的标准:Assay Dissolve about 500 mg of the residue obtained in the
test for Loss on Ignition (below), accurately weighed, by
heating in a mixture of 50 mL of water and 2 mL of hydrochlo-
ric acid. Cool, dilute to 100.0 mL with water, and mix. Transfer
50.0 mL of this solution into a 400-mL beaker, add 100 mL
of water, and heat to 55° to 60°. Add 15 mL of 0.1 M disodium
EDTA from a buret, add a magnetic stirring bar, and while
stirring, adjust with 1 N sodium hydroxide to pH 10. Add 10
mL of ammonia–ammonium chloride buffer TS and 12 drops
of eriochrome black TS, and continue the titration with 0.1
M disodium EDTA until the wine-red color changes to pure
blue. Calculate the weight, in milligrams, of Mg 2 P 2 O 7 in the
residue taken by the formula
2 × 11.13 × V,
in which V is the volume, in milliliters, of 0.1 M disodium
EDTA required in the titration of the 50.0-mL aliquot.
2楼2012-07-05 09:17:09
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yugijiang

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引用回帖:
2楼: Originally posted by yugijiang at 2012-07-05 09:17:09
是FCC的标准:Assay Dissolve about 500 mg of the residue obtained in the
test for Loss on Ignition (below), accurately weighed, by
heating in a mixture of 50 mL of water and 2 mL of hydrochlo-
ric  ...

楼主你好小气呀
3楼2012-07-11 18:22:40
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