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1)  total nitrogen content
总氮含量
1.
Analysis of combining ability and heritability of nicotine content,total nitrogen content and nitrogen/nicotine ratio in burley tobacco;
白肋烟烟碱、总氮含量及氮碱比的配合力与遗传力分析
2.
Through analysis on chemistry properties of various nitrogen forms in compound fertilizers,some problems existing in determination of total nitrogen content in compound fertilizer are solved,and the qualitative analysis of nitrogen form and its key points is also presented for a reference in determination of compound fertilizer.
通过对复混肥料中不同形态氮的化学性质的分析,解答了复混肥料总氮含量检验中的常见问题。
2)  Total nitrogen
总氮含量
1.
Known and unknown total nitrogen in water were measured by ionic chromatograph and GBl 1894-89 ultraviolet spectrophotometer.
采用紫外分光光度法和离子色谱法分别测定已知和未知总氮含量的水样。
3)  total content of amino-N
总氨基氮含量
4)  Soil total N content
土壤总氮含量
5)  TDN total dietary nitrogen
日粮含氮总量
6)  content of total amino N
总氨基酸态氮含量
1.
By examing the RBU value and the content of total amino N of filter syrup under this condition,it was proved that filter syrup could be refined by the facto.
检测此条件下滤出糖液的色相、总氨基酸态氮含量等指标,表明糖液可用工厂精制系统精制,同时滤渣干基粗蛋白质含量提高到0707 0 kg/kg 。
补充资料:总氯含量测定
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性质:氯丁橡胶中总氯含量的测定方法常用的有两种:氧瓶燃烧法和容量法。氧瓶燃烧法是将试样在铂丝为催化剂条件下燃烧,将氯转化为钾盐,再以硝酸汞标准溶液滴定。容量法是将试样与碳酸钠-硝酸钾混合物于350~400℃下熔融分解为氯化氢,同时转化成氯化物,再以硝酸银容量法测定。这些测定方法同时亦可以用于测定氯化丁基橡胶和氯磺化聚乙烯中氯含量。

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