【摘要】 在氢化物发生-原子荧光光谱法测定茶叶中总硒量时,比较了常规湿法消解(方法1)和微波消解(方法2)两种样品前处理方法。结果表明:从测定精密度而论,方法1略优于方法2,茶叶标准样品(GBW 10016)中硒的测定值的相对标准偏差(n=8)值,方法1为0.35%,方法2为0.52%;从准确度方面,所测得方法1的回收率为94%,方法2的回收率为92%。总体上看,方法1优于方法2,更适合用于氢化物发生-原子荧光光谱法测定茶叶中总硒量。更多还原

【Abstract】 The sample pre-treatment of tea by the method of conventional wet-digestion(method 1) and the method of microwave assisted digestion(method 2) were compared in the HG-AFS determination of total selenium.Value of RSD(n=8) found by method 1 was 0.35%,while by method 2 was 0.52%.Value of recovery found by method 1 was 94%,while by method 2 was 92%.As revealed by the experimental results,better precision and recovery were shown by method 1 than by method 2.On the whole,pretreatment of sample by the conventional wet-digestion was preferred to be used in the HG-AFS analysis.更多还原