Tinggi U, Reilly C, Hahn S, Capra M J
Department of Public Health and Nutrition, Faculty of Health Science, Queensland University of Technology, Brisbane, Australia.
Sci Total Environ. 1992 Sep 7;125:15-23. doi: 10.1016/0048-9697(92)90378-6.
Three wet digestion procedures, namely, nitric acid/sulphuric acid, nitric acid/hydrogen peroxide and nitric acid/perchloric acid were compared for their relative efficiency in determining cadmium and lead in marine biological tissues. The nitric acid/perchloric acid procedure was the most efficient, whereas the nitric acid/hydrogen peroxide procedure was the least efficient. The nitric acid/sulphuric acid procedure was also found to be effective but there was a problem with the method as the presence of sulphuric acid in the matrix markedly suppressed the absorbance signals especially for lead analysis and thus reduced sensitivity. The addition of ascorbic acid as matrix modifier improved sensitivity. However, this analysis still required the standard addition method. No apparent interferences were encountered for cadmium analysis.
比较了三种湿式消解程序，即硝酸/硫酸、硝酸/过氧化氢和硝酸/高氯酸在测定海洋生物组织中镉和铅时的相对效率。硝酸/高氯酸程序效率最高，而硝酸/过氧化氢程序效率最低。还发现硝酸/硫酸程序是有效的，但该方法存在一个问题，即基质中硫酸的存在显著抑制了吸光度信号，尤其是在铅分析中，从而降低了灵敏度。添加抗坏血酸作为基体改进剂可提高灵敏度。然而，这种分析仍需要标准加入法。镉分析未遇到明显干扰。
