当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2013年
7期
1021-1022,1032
,共3页
原子荧光光谱%微波消解%大米%砷%汞
原子熒光光譜%微波消解%大米%砷%汞
원자형광광보%미파소해%대미%신%홍
Atomic fluorescence spectroscopy%Microwave digestion%Rice%As%Hg
建立了微波消解—双道原子荧光光谱法同时测定大米中砷和汞含量的方法。通过试验优化了负高压、灯电流、载气流速、原子化器高度、载流酸度和硼氢化钾浓度等测试条件。砷、汞含量分别在1.0~100μg/L 和0.1~10μg/L范围内与荧光强度呈良好的线性关系，线性相关系数均大于0.9996，方法检出限分别为0.052,0.028μg/L，回收率分别为93.4~100.9,90.95~103.6，相对标准偏差均小于5%（n=6）。
建立瞭微波消解—雙道原子熒光光譜法同時測定大米中砷和汞含量的方法。通過試驗優化瞭負高壓、燈電流、載氣流速、原子化器高度、載流痠度和硼氫化鉀濃度等測試條件。砷、汞含量分彆在1.0~100μg/L 和0.1~10μg/L範圍內與熒光彊度呈良好的線性關繫，線性相關繫數均大于0.9996，方法檢齣限分彆為0.052,0.028μg/L，迴收率分彆為93.4~100.9,90.95~103.6，相對標準偏差均小于5%（n=6）。
건립료미파소해—쌍도원자형광광보법동시측정대미중신화홍함량적방법。통과시험우화료부고압、등전류、재기류속、원자화기고도、재류산도화붕경화갑농도등측시조건。신、홍함량분별재1.0~100μg/L 화0.1~10μg/L범위내여형광강도정량호적선성관계，선성상관계수균대우0.9996，방법검출한분별위0.052,0.028μg/L，회수솔분별위93.4~100.9,90.95~103.6，상대표준편차균소우5%（n=6）。
A method was proposed for the simultaneous determination of As and Hg in rice by microwave digestion and hydride generation atomic fluorescence spectroscopy.Negative high pressure,lamp current,carrier gas rate,atomizer height,concentration of HCl and KBH4 in the determination of As and Hg were optimized.The results show that the linear range of As is 1.0~100μg/L with detection limit of 0.052μg/L,while the linear range of Hg is 0.1~10μg/L with detection limit of 0.028μg/L.Both the coefficients of correlation are more than 0.9996.The recoveries of As and Hg are 93.4~100.9%,90.95~103.6% respectively.The relative standard deviations of As and Hg detetion results are less than 5%(n=6).
