Author :
Ghaziaskar, Hassan,Kutsera, Les,Lai, Edward P. C
Descriptors :
Beryllium,Chrome azurol s,Flow injection analysis,Spectrophotometry,Interference limits
Abstract :
A flow injection analysis system which employs a visble absorption detector is used for the determination of bevlium. Be(II) ions are detecled by means of a complexation reaction between Be(II) and chrome azurol as the chomogenic reagent. The reaction forms a stable 1:1 complex which appears dark red-vioet. The optimum conditions for the determination are PH 4.15,32,chrome axurol s,3,bufeer, 62,HCI and 1,3- phenylenediamine,flow rate of 1.0 mL/min,and wavelength at 570 nm. A concentration limit of o.1 ug/mL (or 2 ng in uL of a sample injected) of Be(II) can be detected,and the linear dynamic range extends to 100ug/mL. Some interference limits are established in the presence of EDTA and thiosulfate which are used as masking agents.
