【作者】 蒋天成； 刘守廷； 莫达松； 李植忠； 凌璐阳；

【Author】 JIANG Tiancheng LIU Shouting MO Dasong LI Zhizhong LING Luyang Guangxi Center of Analysis and Test Research, Nanning 530022

【机构】 广西分析测试研究中心；

【摘要】 本文以 HNO₃、HClO₄消解植物试样,通过对分析线的选择、共存基体元素、酸介质对磷测定的干扰、氩气冲洗光谱仪光室时间对谱线信号强度的影响及仪器最佳分析条件等方面的研究,建立了 CID-ICP-AES 法测定植物中磷的方法。测定两个植物国家标准物质成分灌木枝叶和茶叶中的全磷含量,测定结果在标称值范围内,连续测定10个平行样其相对标准偏差均小于2%,波长177.4 nm、178.2 nm、213.6 nm、214.9 nmP 分析谱线检测限分别为9.1 ng/mL、5.5 ng/mL、0.84 ng/mL 和1.1 ng/mL。更多还原

【Abstract】 A direct method was studied for the determination of phosphorus in plants according to CID-ICP-AES.The method using nitric acid and perchloric acid to dissolve plants samples,observed the interference effect of matrix.Analyzed the effect of the Ar gas rushed time of spectrum optical bracket chamber of the spectral sensitivity and optimized analytical parameters of spectrometer,etc. The results of phosphorus content measurement of two plants reference material (bush twigs and leaves and tea)are in a nominal value range and the relative standard deviations of ten samples are less then 2%.The method detection limits were 9.1 ng/mL(177.4 nm),5.5 ng/mL(178.2 nm),0.84 ng/mL(213.6 nm),1.1 ng/mL(214.9 nm).更多还原