光度法测定烟草中的微量硼  

DETERMINATION OF TRACE B IN TOBACCO BY PHOTOMETERY

作　　者：周丽湘 

机构地区：[1]湖南省矿产测试利用研究所,湖南长沙410007

出　　处：《湖南地质》2002年第3期225-227,共3页Hunan Geology

摘　　要：用HNO3和HCl消解烟草样本，在pH为4.2的乙酸—乙酸钠介质中，微量硼与铍试剂Ⅲ形成紫红色络合物，方法灵敏度高，简便易掌握，方法检出限为0.04 μg/ml，线性范围为0～0.4 μg/ml，完全能满足烟草中微量硼的测定要求。Nitrifying and dissolving tobacco samples by HNO3 and HCl, trace B and Be Reagent Ⅲ react and change into purplish red complex compound in acetic acid-sodium acetate medium with pH 4.2. The method, with high sensitivity, simplicity, detection limit 0.04 μg/ml, and linear range 0～ 0.4 μg/ml, can completely meet the needs of determination of trace B in tobacco.

关 键 词：光度法 烟草 硼 检出限 铍试剂Ⅲ 紫红色络合物 灵敏度 

分 类 号：TS47[农业科学—烟草工业]