**
ABSTRACT**

*Đề t**ài:
**Nghiên cứu xác định sự nhiễm bẩn các
dạng tồn tại của các ion As-3+, As-5+, Sb-3+ và Sb-5+ trong mẫu nước ngầm ở Tỉnh
Lâm Đồng*

*Chủ nhiệm: **ThS. Nguyễn Giằng*

The project describes hydride generation atomic absorption spectrometry
techniques for determination of arsenic (III), total arsenic, antimony (III) and
total antimony concentration in water sample by investigating type and
concentration of acide and sodium tetrahydroborate concentration.

The optimal conditions for determination of arsenic (III) were: 2% (m/v)
citric acide and 2%(m/v) sodium tetrahydroborate. The same paramaters for
determinaion of arsenic (V) were: 4N of HCl and 2%(m/v) of sodium
tetrahydroborate in 10% (m/v) of KI

The optimal conditions for determination of antomony (III) were: 2% (m/v)
citric acide and 2%(m/v) sodium tetrahydroborate. The same paramaters for
determination of antimony (V) were: 6 N of HCl and 2%(m/v) sodium
tetrahydroborate in 10% (m/v) of KI.

Interference from ions on the analysis for arsenic (III), total arsenic,
antimony (III) and total antimony were also investigated.

The sensitivity of this method was estimated to
be 0.001ppm, 0.002ppm, 0.002ppm and 0.003ppm for As3+, As3+,5+, Sb3+ and
Sb3+,5+ respectively.