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Updated: May 13, 2025
08:21
Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.
Published on: September 1, 2017
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Hydride Generation-Based Purification Method for High-Precision Antimony Isotopic Analysis in Low-Concentration and
Shuyang Li1,2, Junhang Dong1,2, Linjie Chen1
1State Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences, Wuhan 430074, China.
Analytical Chemistry
|April 16, 2025
Summary
A new two-step purification method using hydride generation (HG) enables precise antimony (Sb) isotope analysis in challenging environmental samples. This rapid technique accurately traces Sb sources and geochemical behavior in complex matrices.
Area of Science:
- Geochemistry
- Environmental Science
- Analytical Chemistry
Background:
- Antimony (Sb) isotopes are crucial for tracing Sb sources and understanding its geochemical behavior.
- Accurate determination of Sb isotopic compositions (δ123Sb) is challenging in low-concentration, complex natural samples.
Purpose of the Study:
- To introduce a novel two-step purification method for high-precision Sb isotope analysis.
- To enable accurate and precise Sb isotopic analysis in low-Sb environmental samples.
Main Methods:
- A two-step purification process involving hydride generation (HG) and a thiol silica column.
- Optimized HG purification with distinct flow and no-flow modes for water and solid samples, respectively.
- Validation using Sb standard solutions and geochemical reference samples.
Main Results:
- Complete Sb purification recovery with effective matrix element removal and low procedure blanks (<0.1 ng).
- Rapid purification times: 1 hour for water samples and 1.5 hours for geological samples.
- δ123Sb values in excellent agreement with reference data, indicating no isotopic fractionation.
Conclusions:
- The novel HG-based method provides a rapid, efficient, and accurate strategy for high-precision Sb isotopic analysis.
- Successfully applied to diverse low-Sb environmental samples (river, seawater, sediments).
- Enhances the investigation of Sb isotopic reservoirs within biogeochemical cycles.
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