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用消解 乳化法处理胶乳样品 ,即先用浓硝酸消解样品 ,以乙醇 甲基异丁基酮混合溶剂溶解消解产物 ,然后用乳化剂Tween -80乳化成乳浊液。建立了快速测定胶乳中镁、锌的FAAS法。以工作曲线法测定。对样品处理方法、消解产物的溶解性质、乳化剂的选择、试液与空白溶液粘度的一致性、线性范围、干扰及检出限进行了考察。测定结果与灰化法一致 ,相对标准偏差小于 3 2 % ,镁、锌的加标回收率分别为 95 85 %～ 10 0 0 %和 99 0 %～ 10 3 0 %。方法简便
The latex sample was digested and emulsified, that is, the sample was digested with concentrated nitric acid, the digested product was dissolved in a mixed solvent of ethanol and methyl isobutyl ketone, and then emulsified into emulsion with Tween-80 emulsifier. A FAAS method for rapid determination of magnesium and zinc in latex was established. To work curve method. The sample processing methods, the dissolution properties of digestion products, the choice of emulsifiers, the consistency of the viscosity of the test solution and the blank solution, linear range, interference and detection limit were investigated. The results were consistent with those of ashing method. The relative standard deviations were less than 32%. The recovery rates of magnesium and zinc were 95 85% ~ 100% and 99 0% -103 0%, respectively. The method is simple