Extraction-atomic absorption method for the determination of arsenic, antimony, selenium and tellurium in geological samples

Determination of Selenium Concentrations in NIST SRM 610, 612, 614 and Geological Glass Reference Materials Using the Electron Probe, LA‐ICP‐MS and SHRIMP II

“…With the exception of shales and coal, which have ~1 μg g -1 and ~3 μg g -1 Se, respectively, the concentration of Se in the Earth's crust is also relatively low, with most rocks containing < 100 ng g -1 Se (Johnson and Bullen 2004, and references therein). Because of the time-consuming and often complicated sample preparation techniques used in previous studies (see Johnson and Bullen 2004 for a comprehensive review) and the high levels of analytical sensitivity required, only a few studies have been published on either Se systematics in geological settings or on Se concentrations in geochemical reference materials (e.g., Yamamoto 1976, Howard 1977, Morgan et al 1981, Morgan 1986, Orberger and Alleweldt 1994, Torgov et al 1995, Marin et al 2001, Lorand et al 2003, Yi et al 2003, Rouxel et al 2004.…”

Determination of Tellurium in Tellurium-Containing Organic Compounds by Microwave Plasma-Atomic Emission Spectrometry

“…The latter dye was used, for example, in the analyses of tellurium salt solutions and semiconductor films [21]. The extraction-photometric redox process was described for the selective determination of selenium(IV) and tellurium(IV) with the detection limit of 510 -5 mg L -1 , based on different oxidability of analytes by antimony(V) ion associates in acidic or alkaline media [22]. The method does not require either preconcentrating and separating analytes, or masking the associated components in analyte mixtures.The possibility of using benzal green as a reagent for the rapid determination of tellurium(IV) is shown by Amelin et al [23].…”

Atomic absorption spectrometry with electrothermal atomization to determine trace amounts of arsenic

“…Determination of arsenic without modification is still problematic (STN EN ISO 15586, 2003). Detection limits for the determination of arsenic range between 1 to 10 µL -1 (Burguera & Burguera, 1997;Torgov et al, 1995;Iglesias et al, 2003;Latva et al, 2000;Shemirani et al, 2005;Gonzalez et al, 2001;Hung et al, 2004;Alonso et al, 2001;Hsiang Man-Ching et al, 2004). Interferences also emerge as a big problem in the determination.…”

“…LOD = 0.05 µg L -1 at the sampling volume of 10 mL (Alonso et al, 2001;Kalahne et al, 1997;Niedzielski et al, 2002;Yang Li-Li et al, 2003) -preconcentration with cryogenic trapping (only HG-AAS). LOD = 0.02 µg L -1 at the sampling volume of 10 mL (Burguera et al, 1998;Pinillos et al, 1995) -preconcentration by liquid extraction: LOD = = 0.05 µg L -1 at the sampling volume of 10 mL (Torgov et al, 1995). Electrochemical processes were also used in the on-line flow-through systems with electrochemical cells applied for the preconcentration of the following elements Pd(II), Pb(II), Cd(II), Cr(III), Cr(VI).…”