Pretreating method, detection limits, accuracy and feasibility are analyzed, sources of heavy metals are listed.
分析了预处理方法的选择、检测限、 精密度、可行性，以及羊绒制品中重金属的来源；
By using special pretreating method before plating aiming at the characteristics of good chemical stability and hydrophobic behavior of PP.
针对PP化学稳定性好、憎水性强的特点，采用了特殊的镀前处理方法。
Another pretreating method was that the sample was dissolved in nitric acid and perchloric acid. It proved that the method was simple and convenient with accurate results.
介绍了用硝酸及高氯酸处理试样后进行铁、铜含量的测定分析，方法简便，回收率高，分析结果令人满意。
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