Patent ID: 8945931
Filing Date: 2015-02-03
Classification: G01N

Abstract:
1. A method of determining the presence or amount of beryllium in a quantity lower than 0.02 ug in a sample, comprising: admixing a sample suspected of containing beryllium or a beryllium compound with a dissolution solution whereby beryllium or a beryllium compound within said sample is dissolved; mixing a portion from said admixture with a buffered solution comprising a fluorescent indicator capable of binding beryllium or a beryllium compound to the fluorescent indicator; wherein the volumetric ratio of the said admixture and the buffered solution is about 1:4, and the pH of the resulting solution is at least 12, and determining the presence or amount of beryllium or a beryllium compound within said sample by measuring fluorescence from said fluorescent indicator; wherein the fluorescence signal is detected by passing through an optical filter which has a peak transmission in the range of 440 nm to 500 nm with a minimum bandwidth of 5 nm.