1987 Volume 36 Issue 2 Pages 120-122
Nanogram per liter levels of mercury in water was determined by flameless AAS after preconcentration from a large sample volume, on KMnO4-coated glass beads as previously reported. Take 5 l of the sample in a glass bottle and add 15 ml of H2SO4 and 10 ml of H2SO4 (1M)-SnCl2(5%) solution. Pass mercury-free air into the sample at a flow rate 5 l/min for 20 min. Collect the generated mercury on the KMnO4-coated glass beads packed in a glass tube. Determine mercury as in the previous report. As these glass beads could collect mercury completely at high flow rates, complete generation and collection of mercury from a large sample volume could be done in a short time. Mercury in potable and deionized water determined by this method gave results of 23 ng/l.
