摘要
采用微波消解-氢化物原子荧光法测定烟草中痕量砷：空心阴极灯电流130n1A，开启高强度模式，检测器电压为320V，载气与保护气流速分别为200、700mL／min，添加硫脲一抗坏血酸预还原样品中的As5＋，方法检出限为0．034ng／mL，线性相关系数为0．999。测试4种市售香烟，测试变异系数为1．34％-4．55％，加标回收率97．7％-100．2％，方法适用于烟草中砷的测定。
Trace arsenic in tobacco was determinated by means of atomic fluorescence spectrometry with microwave digestion. The instrument parameters were as following： hollow cathode lamp current and detector voltage at 130 mA and 320 V with high intensity mode, and flow rate of Carrier gas and protecting gas at the velocity of flow of 200 mL/min and 700 mL/min respectively. Thiourea and ascorbic acid were added into sample, and arsenic was reduced from As5＋ to As3＋ before test by AFS. The detection limit was 0.034 ng/mL and linear correlation coefficient was 0.999. Four different tobaccos were tested, the Coefficient of variation （CV） and the recovery rate of this method were between 1.34% and 4.55% and from 97.7% to 100.2% respectively. The method is suitable for arsenic determination of tobacco.
出处
《顺德职业技术学院学报》
2012年第3期11-13,共3页
Journal of Shunde Polytechnic
关键词
原子荧光
烟草
砷
atomic fluoresces
tobacco
arsenic
