| 饲料级磷酸氢钙中钙的分析方法探讨 |
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| 引用本文： | 马毅.饲料级磷酸氢钙中钙的分析方法探讨[J].磷肥与复肥,1999,14(1):65-65. |
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| 作者姓名： | 马毅 |
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| 作者单位： | 云南磷化学工业（集团）公司海口磷矿饲钙厂 |
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| 摘 要： | 饲料级磷酸氢钙中钙含量的测定采用配位滴定法，按ＨＧ２６３６－９４标准进行：在试样中加入过量的ＥＤＴＡ与钙配位，加缓冲溶液（ｐＨ＝１０）１０ｍｌ，以Ｋ．Ｂ为指示剂，用锌标准溶液滴定过量的ＥＤＴＡ，以空白试验与试样溶液消耗锌标准溶液的体积差为钙消耗ＥＤＴ...
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| 关 键 词： | 磷酸氢钙 钙分析 饲料 |
Discussion on Analysis Method for Ca in Feedgrade Dicalcium Phosphate |
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| Ma Yi.Discussion on Analysis Method for Ca in Feedgrade Dicalcium Phosphate[J].Phosphate & Compound Fertilizer,1999,14(1):65-65. |
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| Authors: | Ma Yi |
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| Abstract: | The problems of calcium analysis method in feed grade dicalcium phosphate based on the standard of China(HG 2636-94) are discussed, and a method of complexometric titration with EDTA is put forward. In this way dextrin is used as protective agent to eliminate magnesium interference, triethanolamine as screening agent to eliminate iron and aluminium interference. This method is quick and accurate. |
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| Keywords: | feedgrade dicalcium phosphate calcium analysis complexometric titration protective agent screening agent |
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