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本研究证实了均三溴偶氮胂与钙络合,其灵敏度比对溴偶氮胂为高,并可用于测定土壤及天然水中微量钙这一理论推测.并测得其摩尔吸收为1.2×10~5,最大吸收波长为645nm,最佳介质pH值为11.9。[Ca~(2+)]在0～50μg范围内,工作曲线呈直线。回收试验满意。40倍Mg~(2+),同浓度的Sr~(2+)、Ba~(2+)无干扰。同浓度的Cu~(2+)、Cd~(2+)、Co~(2+)、Cr~(3+)有干扰。
This study confirmed that the average tribromoarsenazo complex with calcium, the sensitivity of bromine arsenazo higher than, and can be used to determine trace amounts of calcium in soil and natural water that the theory of speculation and measured the molar absorption of 1.2 × 10 ~ 5, the maximum absorption wavelength of 645nm, the best medium pH value of 11.9. [Ca ~ (2+)] in the 0 ~ 50μg range, the working curve was a straight line. Recycle test satisfied. 40 times Mg ~ (2+), with the same concentration of Sr ~ (2 +), Ba ~ (2+) without interference. The same concentration of Cu ~ (2 +), Cd ~ (2 +), Co ~ (2 +), Cr ~ (3 +) interference.