| 饲料中尿素测定方法的研究 |
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| 引用本文： | 武金凤,郭志刚,郝美艳.饲料中尿素测定方法的研究[J].中国农业科技导报,2008,10(Z2):87-93. |
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| 作者姓名： | 武金凤 郭志刚 郝美艳 |
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| 作者单位： | 农业部饲料质量监督检验测试中心（呼和浩特） |
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| 摘 要： | 建立了饲料中尿素的测定方法。经亚铁氰化钾和乙酸锌提取饲料中的尿素,用比色法测定。尿素在0.1~10 mg/mL范围内线性关系良好,回归方程为Abs=0.056 82×C-0.001 41,相关系数r=0.999 9,最低定量限为0.1%。为了验证方法的准确度、精密度,配制了不添加尿素的奶牛精补料、羊精补料、奶牛浓缩料、羊浓缩料、肉牛浓缩料等空白饲料,对不同饲料进行了多浓度、多次的添加回收实验,平均回收率均在80.0%~120.0%范围内,RSD均小于10.0%。
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| 关 键 词： | 饲料 尿素 比色法 |
Study of Determination of Urea in Feed |
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| WU Jin-feng,GUO Zhi-gang,HAO Mei-yan.Study of Determination of Urea in Feed[J].Journal of Agricultural Science and Technology,2008,10(Z2):87-93. |
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| Authors: | WU Jin-feng GUO Zhi-gang HAO Mei-yan |
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| Institution: | Feed Quality Supervision and Testing Center（Hohhot）|Ministry of Agriculture|Hohhot 150100|China |
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| Abstract: | A method for determination of urea in feed was estabilished.Urea was extracted by potassium hexacyanoferrate and zinc acetate,determined by colorimetry.The linear range of the method was among 0.1~10 mg/mL,with correlation coefficient was 0.999 9.The concentration limit of quantity was 0.1%.In order to validate accuracy and precision of the method,several kinds of reference feeds such as cow concentrate supplement,sheep concentrate supplement,cow concentrate,sheep concentrate and beef concentrate,were prepared to do adding-recovery experiments for many times,the average recorvery rate was 80.0%~120.0%,and the RSDs was less than 10.0%. |
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| Keywords: | feed urea colorimetry |
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