Chemical composition analysis by microprobe shows that its colour is related to the content of CuO.
电子探针成分分析表明，其颜色是由铜离子引起的，铜的含量越高，颜色就越鲜艳。
To evaluate the nutritional value of protein for 67 Sichuan local wheat cultivars, the protein content and amino acid composition were studied by chemical and HPLC analysis.
为了评价四川小麦地方品种籽粒蛋白质的营养价值，本文通过化学分析法研究了67个四川小麦地方品种的蛋白质和氨基酸含量及其组成特性。
Based on the results of chemical analysis of the coal ash, with reference to the standard composition of minerals the content of various mineral phases in the coal ash has been determined.
根据煤灰化学成分分析结果，参照矿物标准成分推算各矿物相在煤灰中的含量。
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