Automated Hydride Evolution System Design
Author Information
Author(s): A.L. Dennis, D.G. Porter
Primary Institution: Laboratory of the Government Chemist
Hypothesis
Can an automated hydride evolution system improve the measurement of arsenic and selenium in water?
Conclusion
The new automated system significantly improves the precision and reliability of arsenic and selenium measurements compared to manual methods.
Supporting Evidence
- The automated system has been in routine use for about two years and has proven reliable and economical.
- Detection limits of 0.1 µg/L were achieved for both arsenic and selenium.
- The new pumping system increased the life of pump tubes from less than one week to at least one month.
Takeaway
This study created a machine that helps scientists measure harmful elements in water more accurately and safely.
Methodology
The study involved developing an automated system using continuous flow techniques for hydride generation and measurement with atomic absorption spectrometry.
Limitations
The original system was expensive to maintain and required skilled operators, which limited its routine use.
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