【摘要】 提出了香菇中硒的氢化物发生-原子荧光光谱测定方法。样品经硝酸消化后蒸发至约2 mL,在6 mol·L^-1盐酸10 mL介质中煮沸使硒（Ⅵ）完全还原至硒（Ⅳ）,分取部分试液加入铁氰化钾后供氢化物发生-原子荧光光谱法测定。氢化物发生系在5 g·L^-1氢氧化钾介质中加入硼氢化钾浓度为20 g·L^-1时进行。测定中采用标准曲线法,其硒的质量浓度范围为60μg·L^-1以内。方法的检出限（3s/k）为0.26μg·L^-1。应用此方法测定标准物质（GBW 085036）中硒量,测定值(0.046μg·g^-1)与证书值（0.049±0.014）μg·g^-1相符,其相对标准偏差（n=6）为2.1%。更多还原

【Abstract】 HG-AFS was applied to the determination of Selenium in dried mushrooms.Dried mushroom sample was digested with conc.HNO₃.The solution was evaporated to ca.2 mL,and kept boiling gently for 3- 5 min after addition of 10 mL of 6 mol·L^-1 HCl to reduce Se（Ⅵ） completely to Se（Ⅳ）.An aliquot of the sample solution was taken for the HG-AFS determination after addition of K₃ Fe（CN）₆.Hydride generation was performed in 5 g·L^-1 KOH medium with 20 g·L^-1 of KBH₄.Standard curve with mass concentration of Se（Ⅳ） in the range within 60μg·L^-1 was used for the determination.Detection limit（3s/k） found was 0.26μg·L^-1.The proposed method was used to analyze a CRM of wheat powder（GBW 085036）,giving the analytical result of Se 0.046μg·g^-1,which is in consistency with the certified value（0.049±0.014）μg·g^-1,and the value of RSD（n=6） found was 2.1%.更多还原