The intermediate were purified by recrystallization. The analysis of purity of the products was studied through HPLC.
用重结晶法对所合成的中间体进行了提纯 ，并用高效液相色谱对产物纯度进行了分析。
It is reveal by GC analysis that the purity of the TMP, treated by reduced pressure distillation and recrystallization in acetic ester, approximates to that of the reagent grade TMP.
GC分析结果表明：采用减压蒸馏及乙酸乙酯重结晶并用的方法精制的TMP纯度接近于试剂级TMP。
HPLC methods were used for the qualitative and quantitative analysis. The purity of carotene crystal was 88.56% by HPLC method.
用高效液相色谱对纯化样品进行了定性和定量分析，结果显示三次重结晶后胡萝卜素纯度为88.56%。
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