Gas-Liquid Separator Integrated to HG-QFAAS Method for Determination of Tin at TraceLevels in the Water Samples

Abstract

The determination of tin (Sn) ion at trace levels using integrated gas-liquid separator with hydride
generation-quartz furnace atomic absorption spectrophotometer (HG-QFAAS) has been done. This
modified gas-liquid separator at various sizes was able to increase sensitivity in the determination of
Sn in solution. The acid reagent mixing techniques, sample and reductant optimally occurs in a coil
reaction before they are going to the gas-liquid separators. The optimum conditions of parameter
measurement in the determination of Sn ion with HG method are influenced by type and concentration
of acid, and the concentration of reductant has been evaluated. These optimum parameters can
increase of analytical performance simultanly, which is shown by detection limit 3.74 µg L-1 for 100
µL injection volume (3.74 pg Sn). The accuracy of measurement shown by the percentage of recovery
of the Sn determination in natural water sample at >95 %, indicate this technique is good to be applied
for tin analysis at picogram level.