双波长β修正光度法测定水和食品中钙  

Dual-wavelength Beta-Correction Spectrophotometric Determination of Calcium in Water and Food

作　　者：邹锋[1] 

机构地区：[1]淮北市啤酒厂

出　　处：《光谱实验室》1996年第4期41-44,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：在碱性介质中，钙（Ｃａ２＋）与铬蓝黑Ｒ（ＥＢＲ）配合生成红色配合物。本文研究β修正光度法直接比色测定亚微量和常量浓度钙，灵敏度和准确度较高。钙０－４０μｇ／２５ｍＬ范围内修正的吸光度遵守比耳定律，钙检出限１．０μｇ／２５ｍＬ。结果满意。Calcium(Ⅱ) can develop a red chelate with erichrome blue black R(EBR). The updated principle, beta-correction theory described in this paper was applied to the determination of calcium. The results showed that both accuracy and sensitivity were high enough to analyse directly Ca in water and food. Over the range of 0-40 μg/25mL Ca Beer's law was employed with the detection limit of 0. l-μg/25mL. All of the analysed parameters were satisfactory.

关 键 词：双波长β修正 光度法 铬蓝黑R 水 食品 钙测定 

分 类 号：TS207.3[轻工技术与工程—食品科学] O657.32[轻工技术与工程—食品科学与工程]