摘要
本文以聚四氟乙烯（ＰＴＥＥ）悬浮体为氟化剂，对悬浮体制样ＥＴＶ－ＩＣＰ－ＡＥＳ直接测定生物试样中不同挥发性元素锡、铜和镉的蒸发行为，影响因素及分析性能进行了比较研究，得出了相应的规律性。在选定实验条件下，本法测定ＭＯ，Ｃｕ和Ｃｄ的检出限分别为０．４３、４．２和１４１ｎｇ／ｍＬ，ＲＳＤ分别为３．８％、４．２％和２．２％。提出的方法已应用于ＣＲＭ２８１生物标样分析，结果与参考值吻合。
A method for direct determination of Mo, on and Cd in biological samples by nuorination electrothermal vaporization-ICP-AES technique with polytetrafluoroethylene (PTFE) disperser as a fluorination agent has been described. The vaporization behaviour, effect factor and analytical characteristic of above mentioned elements with different volatile in ETV-ICP-AES were studied and the correlative regularity was obtained. Under selected experimental conditions the de. tection limit of Mo, Cu.and Cd were 0. 43, 4. 2 and 141 ng/ml, and the variation coefficients were 3. 8, 4. 2 and 2. 2% respectively. The method proposed has been applied in analysis of CRM 281 biological standard samples, and the results determined were in good agreement with the certified values.
出处
《分析科学学报》
CSCD
1995年第2期10-15,共6页
Journal of Analytical Science
基金
国家自然科学基金
国家教委博士点基金
关键词
氟化电热蒸发
生物试样
钼
铜
镉
ICP-AES
Slurry sampling
Fluorinating electrothermal vaporization
Biological samples
Molybdenum
Copper
Cadmium
ICP spectrometry
