Determination of Arsenic in Drinking Water by Graphite Furnace Atomic Absorption Spectrophotometry
- VernacularTitle:水中砷的石墨炉原子吸收测定法
- Author:
Li-Ping WANG
;
Gao-Zhang FAN
;
- Publication Type:Journal Article
- Keywords:
Arsenic;
Graphite furnac atomic absorption spectrophotometry;
Water;
Palladium
- From:
Journal of Environment and Health
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
ve To establish a method for determination of arsenic in drinking water. Methods The contents of arsenic in water samples were determined directly by graphite furnace atomic absorption spectrophotome-try with masking agent of palladium. The working conditions were defined as wave length of 193.7 nm, slit width of 1.3 nm, current of hollow cathode lamp of 12.0 mA; drying 40 sec at 80℃~140℃ ; ashing 20 sec at 1100℃~1200℃; atomizing 5 sec at 2 300℃; purifying 4 sec at 2 600℃ . Results The linear relationship was 10~200?g/ L ar-senic. The average recovery rates of water samples at concentrations of 50 ?g/ L and 150?g/ L arsenic after being added arsenic standard solutions were 100.7% and 103.6% respectively, and sensitivity reached 10?g/ L. The cor-relation coefficient were 0.9954~0.999 7 obtained from 6 randomly repeated determination of standard curve. The metal ions coexisting in determined water samples didn't interfere the determination of arsenic under the application of common uncoated graphite tube. The 0.2% aluminum didn't disturb the determination of arsenic also. Conclusion This method could be applied in the determination of arsenic in water, especially could be applied in the direct deter-mination of arsenic in more clear water samples.
