GFAAS Determination of Microamounts of Antimony Eroded from Glass Hollow Wares

Sample of transparent glass hollow-ware was soaked in HOAc(4+96) to dissolve antimony from the sample.GFAAS was used to determine the amount of antimony eroded from the hollow-ware within definite time of soaking.Cupric ion solution was added as matrix modifier and background correction with deuterium lamp was adopted in GFAAS determination.Matching method was used in preparation of calibration curve and blank solution to compensate the error arisen from the presence of acetic acid.Conditions of the temperature elevation program,especially the temperature for ashing and atomization,were tested and optimized.Linear relationship between values of absorbance and mass concentration of antimony was obtained in the range within 20 μg·L-1.Detection limit (3S/b) and characterization concentration of the method found for antimony were 0.483 μg·L-1 and 0.396 pg/1% respectively.Test for recovery was made by standard addition method,and values of recovery found were in the range of 93%-104%.