A novel technique for the trace analysis of metal ions Zn(II), Be(II), and Bi(III) in bulk solutions is discussed. This technique involves the generation of a chemiluminescence signal from alkaline phosphatase catalyzed hydrolysis of a phosphate derivative of 1,2-dioxetane. Zn(II) can be determined by two methods, reactivation of the alkaline phosphatase apoenzyme and inhibition of the native enzyme. Be(II) and Bi(III) can be determined quantitatively by inhibition of the native enzyme. Subppb to ppm level detection of Zn(II), Be(II), and Bi(III) has been achieved. Initial studies with mixed metals are also reported. The technique described is rapid and sensitive and can be readily applied to the microassay of heavy metal ions.
本文讨论了一种用于痕量分析块状溶液中
金属离子 Zn(II)、Be(II) 和 Bi(III) 的新技术。该技术通过碱性
磷酸酶催化 1,2-dioxetane 的
磷酸盐衍
生物水解产生
化学发光信号。Zn(II) 可以通过两种方法测定,即重新激活碱性
磷酸酶辅酶和抑制原生酶。Be(II) 和 Bi(III) 可以通过抑制原生酶来定量测定。对 Zn(II)、Be(II)和 Bi(III)的检测达到了亚ppb 到 ppm 的
水平。报告还对混合
金属进行了初步研究。所述技术快速灵敏,可随时应用于重
金属离子的微量分析。