| 邻—甲酚酞光度法快速测定饲料中钙 |
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| 引用本文： | 戚邦华,印天寿.邻—甲酚酞光度法快速测定饲料中钙[J].理化检验(化学分册),1998,34(9):406-407. |
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| 作者姓名： | 戚邦华 印天寿 |
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| 作者单位： | 安徽农业技术师范学院!凤阳233100 |
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| 摘 要： | 以钙与邻-甲酚酞在pH11的乙醇胺-硼酸缓冲溶液中的紫色反应,建立了快速测定饲料中钙的光度法,λ_(max)=570nm,测定的线性范围为0～10μg/6ml,ε=1.8×10~4,加标回收率为98%～101%,RSD为3.6%,用于饲料中钙的快速测定,取得了满意结果.
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| 关 键 词： | 钙 饲料 邻-甲酚酞 光度法 |
RAPID PHOTOMETRIC DETERMINATION OF CALCIUM IN FEED WITH o-CRESOLPHTHALEIN |
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| Qi Banghua and Yin Tianshou.RAPID PHOTOMETRIC DETERMINATION OF CALCIUM IN FEED WITH o-CRESOLPHTHALEIN[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,1998,34(9):406-407. |
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| Authors: | Qi Banghua and Yin Tianshou |
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| Abstract: | A new spectrophotometric method for rapid determination of calcium in feed based on its color reaction with o-cresolphthalein in a basic medium of pH 11 of ethanol-boric acid buffer solution is investigated. The absorption maxima lies at a wavelength of 570nm. The linear range of determination is 0~10ug of Ca2 in a vol-ume of 6ml. Its apparent molar absorptivity is 1. 8?104, the percentage of recovery with standard solution addition is about 98%~ 101%, the RSD is about 3. 6%. The method has been used for the rapid determination of calcium in feed with satisfactory results. |
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| Keywords: | Calcium Feed o-cresolphthalein Photometry |
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