当前位置: 首页 > 文章 > 分光光度法测定爆米花中的铅含量 山地农业生物学报 2012,31 (5) 464-466
Position: Home > Articles > Measurement of Pb Content in Popcorn Using Spectrophotography Journal of Mountain Agriculture and Biology 2012,31 (5) 464-466

分光光度法测定爆米花中的铅含量

作  者:
周玉惠;娄方燕
单  位:
贵州大学化学与化工学院
关键词:
爆米花;铅含量;分光光度法;湿法消化法
摘  要:
用紫外分光光度计测定酸性条件下铅离子与碘化钾及孔雀石绿三元络合物显色体系的吸光度,代入标准曲线方程得到溶液中铅离子的浓度,并用硝酸-过氧化氢湿法消化法对样品进行预处理。结果表明:该显色体系的最大吸收波长为620 nm,反应的稳定性良好,是一种简便准确的爆米花铅含量的测定方法。
译  名:
Measurement of Pb Content in Popcorn Using Spectrophotography
作  者:
ZHOU Yu-hui,LOU Fang-yan(College of Chemistry and Chemical Engineering,Guizhou University,Guiyang Guizhou 550025,China)
关键词:
popcorn;Pb content;Ultraviolet spectrophotography;Wet digestion method
摘  要:
Wet digestion method was employed to prepare sample,then,ultraviolet spectrophotometer was used to measure the absorbance of the color system formed by the conversion of Pb ion,KI and malachite under acidic condition.Subsequently,Pb content of popcorn is derived from the standard curve.Results suggested that the maximum absorption wavelength of the system was 620 nm and the good stability was obtained which revealed a sample and precise method for Pb quantification in popcorn.

相似文章

计量
文章访问数: 5
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊