Abstract
Complete loss of trimethylarsine upon passage through a Nafion membrane dryer was identified. Pronounced loss of dimethylarsine—19 and 66%, depending on dryer dimensions—was also observed; arsine and methylarsine did not exhibit significant losses. Arsines were generated from corresponding precursors at the 2 ng ml−1 level by tetrahydroborate reduction, after passing through the dryer separated by cryotrapping and thermal desorption and detected by atomic absorption spectrometry with a quartz multiatomizer. Since Nafion membrane dryers have been commonly used in analytical atomic spectroscopy, implications for trace and speciation analysis of arsenic are discussed. A dryer based on sodium hydroxide pellets is proposed as an alternative, safe for all arsines.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call