灰化时间对测定椰子叶中K、Ca、Na、Mg含量的影响

Effects of the Incinerating Time on Assaying K,Ca,Na and Mg in Coconut Leaves

以椰子叶为材料,比较不同高温灰化时间对测定椰子叶中K、Ca、Na、Mg元素含量的影响。通过低温预灰化和不同时间的高温灰化处理后,利用原子吸收分光光度法测定样品中4种元素的含量。结果表明,测定椰子叶中的4种元素含量时,适宜高温灰化时间分别为2、2.5h、2h、2.5h;同时测定该4种元素含量时,适宜高温灰化时间为2.5h。且2.5h高温灰化时,元素的平均回收率为95%～106.3%。

The coconut leaves were used as samples analyzed effects of incinerating time on assaying content of K, Ca, Na and Mg in coconut leaves .With low temperature and different time high temperature for incinerating coconut leaves, it was assayed that contents of K, Ca, Na and Mg in the samples on Atomic Absorptive Spectrophotometer. The results showed as below： For assaying contents of K, Ca, Na and Mg in coconut leaves, respectively, the optimum time of high temperature for incinerating was 2 h, 2.5 h, 2 h, 2.5 h. However, for assaying the coconuts of these four elements at the same time, the optimum time was 2.5 h. Meanwhile, it was showed that the recovery rate of elements were 95%-106.3% at 2.5 h of high temperature incinerating.