并将磷酰苯肼和相应的硫代磷酰苯肼在环氧树脂(E - 44)中的阻燃性能进行了对比试验，结果表明硫元素与磷、氮元素有协同作用。
The flame retardance in epoxy E-44 was discussed as well, and the flame retardance of the compounds of sulfur containing and not containing have been compared.
本文对二苯碳酰二肼分光光度法测定地表水及工业废水中六价铬的样品预处理方法提出了改进措施。
In this paper, the preparatory treatment for determination of Cr6+ in ground water or industrial effluents by the method of spectrophotometry has been improved.
本文对二苯碳酰二肼分光光度法测定地表水及工业废水中六价铬的样品预处理方法提出了改进措施。
In this paper, the preparatory treatment for determination of Cr6+ in ground water or industrial effluents by the method of spectrophotometry has been improved.
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