化学分析计量
化學分析計量
화학분석계량
CHEMICAL ANALYSIS AND METERAGE
2014年
4期
45-47
,共3页
原子荧光法%茶叶%硒
原子熒光法%茶葉%硒
원자형광법%다협%서
atomic fluorescence spectrometry%tea%selenium
采用原子荧光法测定茶叶中的硒含量，对样品消解温度及仪器条件进行了优化。还原剂为1.0%硼氢化钾–0.5%氢氧化钾溶液，载流液为3%盐酸溶液。在优化条件下，硒的质量浓度在0～20 ng／mL范围内与荧光强度呈良好的线性关系，相关系数r=0.999，检出限为0.8 ng／mL。该法的加标回收率为88.08％～101.39％，测定结果的相对标准偏差为2.03%～4.84％(n=6)。该方法实际操作性强，准确度高，适用于日常检验工作中对批量茶叶中硒含量的测定。
採用原子熒光法測定茶葉中的硒含量，對樣品消解溫度及儀器條件進行瞭優化。還原劑為1.0%硼氫化鉀–0.5%氫氧化鉀溶液，載流液為3%鹽痠溶液。在優化條件下，硒的質量濃度在0～20 ng／mL範圍內與熒光彊度呈良好的線性關繫，相關繫數r=0.999，檢齣限為0.8 ng／mL。該法的加標迴收率為88.08％～101.39％，測定結果的相對標準偏差為2.03%～4.84％(n=6)。該方法實際操作性彊，準確度高，適用于日常檢驗工作中對批量茶葉中硒含量的測定。
채용원자형광법측정다협중적서함량，대양품소해온도급의기조건진행료우화。환원제위1.0%붕경화갑–0.5%경양화갑용액，재류액위3%염산용액。재우화조건하，서적질량농도재0～20 ng／mL범위내여형광강도정량호적선성관계，상관계수r=0.999，검출한위0.8 ng／mL。해법적가표회수솔위88.08％～101.39％，측정결과적상대표준편차위2.03%～4.84％(n=6)。해방법실제조작성강，준학도고，괄용우일상검험공작중대비량다협중서함량적측정。
The determination of selenium in tea by atomic fluorescence spectrometry was established. The digestion temperature and instrument conditions were optimized. The reducing agent was 1.0% potassium borohydride–0.5%potassium hydroxide solution and the carrier liquid was 3%hydrochloric acid solution. Under the optimized conditions, the concentration of selenium was linear with fluorescence intensity in the range of 0–20 ng/mL,the linear correlation coefficient was 0.999. The recovery of the method ranged from 88.08%to 101.39%. The relative standard deviation of detection results was 2.03%–4.84%(n=6). The method is feasible,has high accuracy,and it was suitable for determination of selenium in bulk tea for routine inspection work.
