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对比了几种预处理方法,找到了高浊度水源水样中钛元素总量测定的最佳预处理方法,即利用微波消解法处理样品后用电感耦合等离子体质谱仪测定。该方法可测定钛浓度<100μg/L的样品,低浓度和高浓度标准曲线的相关系数分别为0.999 98和0.999 95,检出限为0.041μg/L,样品测定精密度RSD在0~2.71%之间,平均回收率在92.1%~104.5%之间。同时发现高浊度太湖源水中的钛元素呈悬浮态吸附在杂质上,而不是以溶解态形式存在。
Several pretreatment methods were compared to find the best pretreatment method for the determination of total titanium in water samples with high turbidity, that is, the samples were treated by microwave digestion and determined by inductively coupled plasma mass spectrometry. The method can be used for the determination of titanium with a concentration of less than 100μg / L. The correlation coefficients of low and high concentration standard curves are 0.999 98 and 0.999 95, respectively. The detection limit is 0.041μg / L, the RSD of the sample is 0-2.71% Between the average recovery of 92.1% ~ 104.5%. At the same time, it was found that the titanium in the high turbidity Taihu Lake source water was adsorbed on the impurities in the suspended state rather than in the dissolved state.