Waidmann E, Stoeppler M, Heininger P
Institute of Applied Physical Chemistry, Research Center (KFA) Jülich, Germany.
Analyst. 1992 Mar;117(3):295-8. doi: 10.1039/an9921700295.
By using isotope dilution mass spectrometry with thermal ionization, TI concentrations were determined in sediments from six sampling positions of the River Elbe in the area of the former GDR (Bad Schandau, Dresden, Barby, Magdeburg, Werben/Havel and Cumlosen). For comparison, two samples from the River Rhine near Emmerich taken in 1978 and 1990 and the Community Bureau of Reference (BCR) certified reference material (CRM) 320 River Sediment were also analysed. Thallium concentrations after complete decomposition by high-pressure digestion (HNO3 + HF) and aqua regia [HCI-HNO3 (3 + 1)] ranged from 537 micrograms kg-1 in the BCR CRM 320 to 5192 micrograms kg-1 in the River Rhine sediment (1978) near Emmerich. The reproducibility of the method ranged from 0.06 to 4.7%. Only 49-94% of the total amount of TI was found after extraction with 1 mol dm-3 HNO3 and 43-86% after extraction with aqua regia. Sediments from Dresden, Barby, Werben/Havel and Cumlosen were found to have virtually identical TI concentrations as the River Rhine sediment sampled in 1990. In comparison with the extremely high Hg and As concentrations found in the River Elbe in an earlier study, the TI concentrations were not as high as expected.
通过使用热电离同位素稀释质谱法，测定了前民主德国地区易北河六个采样点（巴特尚道、德累斯顿、巴比、马格德堡、韦尔本/哈弗尔和库姆洛森）沉积物中的铊浓度。作为比较，还分析了1978年和1990年在埃默里希附近采集的莱茵河的两个样品以及欧洲共同体标准物质局（BCR）认证的标准物质（CRM）320河底沉积物。经高压消解（硝酸+氢氟酸）和王水[盐酸-硝酸（3+1）]完全分解后的铊浓度，在BCR CRM 320中为537微克/千克，在埃默里希附近的莱茵河沉积物（1978年）中为5192微克/千克。该方法的重现性在0.06%至4.7%之间。用1摩尔/立方分米硝酸萃取后，仅发现铊总量的49%-94%，用王水萃取后为43%-86%。发现德累斯顿、巴比、韦尔本/哈弗尔和库姆洛森的沉积物中的铊浓度与1990年采集的莱茵河沉积物几乎相同。与早期研究中在易北河中发现的极高汞和砷浓度相比，铊浓度没有预期的那么高。
