摘要
利用生物发光技术建立了一种高灵敏度的检测微量焦磷酸 ( PPi)的新方法。其原理是首先利用 ATP硫酰化酶 ( ATP sulfurylase)将焦磷酸 ( PPi)定量转化成ATP,然后利用虫荧光素酶 ( Luciferase)系统发光检测 ATP的量 ,从而确定样品中PPi的含量。本法快速、灵敏 ,线性范围为 1× 1 0 - 9~ 5× 1 0 - 7mol/ L。方法用于 PCR扩增样品中 PPi的检测 。
A new method for the analysis of inorganic pyrophosphate (PPi) by utilization of ATP sulfurylase and luciferase is described. In the assay, PPi in the samples is converted to ATP by ATP sulfurylase, then ATP can be detected by ATP bioiuminescent assay kit. The PPi contained in the reagent can be removed by a long incubation with a low concentration of PPase. The assay is extremely sensitive and rapid. The linear ranges is 1×10 -9 ~ 5×10 -7 mol/L, and the detection limit is 2.8×10 -11 mol/L.
出处
《分析科学学报》
CAS
CSCD
北大核心
2003年第1期45-47,共3页
Journal of Analytical Science