Determination of total tin in silicate rocks by graphite furnace atomic absorption spectrometry

Determination of total tin in sediment reference materials by isotope dilution inductively coupled plasma mass spectrometry after alkali fusion

“…The method of alkali fusion employed in this study was adopted from Elsheimer and Fries. 5 A 0.15-0.2 g amount of the sample was mixed with 0.75 g of LiBO 2 in a high-purity glassy carbon (Toho Carbon, Tokyo, Japan) or platinum crucible and heated in a muffle furnace at 1000 °C for 15 min. Sediment samples were precombusted at 500 °C for 4 h in a Pyrex glass beaker to remove organic carbon when a platinum crucible was used for fusion.…”

“…The subsequent solvent extraction procedure was based on that of Elsheimer and Fries. 5 An aliquot of the stock sample solution (typically 25 g) was placed in a capped 50 mL Teflon centrifuge tube and 0.45 g of ascorbic acid was added. Then 10 mL of 4% TOPO in IBMK was added and the mixture was shaken for 10 min by using a mechanical shaker.…”

“…Tin (Sn) in geological materials has been determined in the context of ore exploitation and understanding of the geochemistry of this element. A number of methods are available for the determination of total Sn in this matrix, such as atomic absorption spectrometry (AAS), [1][2][3][4][5][6] inductively coupled plasma atomic emission spectrometry (ICP-AES) 7 and X-ray fluorescence spectrometry (XRF), 7 although the sensitivity of the last two methods is not high enough for the trace determination of Sn. Total Sn determination in geological materials has tended to be concentrated on rocks and ores and relatively little attention has been paid to Sn in sediments.…”