Automated determination of mercury in sediments

Metals in Sediments

“…Various workers have used nitric sulfuric acid [42][43][44] and then potassium persulfate oxidation and stannous chloride reduction 45 to digest sediments prior to the determination of mercury.…”

“…[48][49][50][51][52][53][54][55] Iskander et al 43 applied flameless atomic absorption to a sulfuric acid-nitric acid digest of the sample following reduction with potassium permanganate, potassium persulfate, and stannous chloride. [48][49][50][51][52][53][54][55] Iskander et al 43 applied flameless atomic absorption to a sulfuric acid-nitric acid digest of the sample following reduction with potassium permanganate, potassium persulfate, and stannous chloride.…”

“…Jurka and Carter 48 have described an automated determination of down to 0.1 μg L −1 mercury in river sediment samples in this method.…”

Optimization of Microwave Digestion for Mercury Determination in Marine Biological Samples by Cold Vapour Atomic Absorption Spectrometry

“…These conventional procedures require also the use of large amounts of reagents with resultant negative effects on blank values 7 . Elemental mercury, organo-mercury compounds and mercury complexes are volatile, therefore during sample preparation must be considered [8][9][10][11] . Teflon closed vessels have several advantages compared with open vessels: 1) no acid is lost during the digestion, so that less acid amounts are needed, 2) airborne contamination is eliminated and 3) higher pressures can be used.…”

Reproducibility in automated determination of mercury in mining industry discharges

“…All operations involving reagents were performed in an anhydrous argon atmosphere; 0.1 M solutions of (C6HS)3P (Fluka p.a.) and (C6H5)3PO (5) in toluene-d8 (Merck p.a.) were prepared.…”