Ion chromatographic determination of trace level phosphorus in purified quartz

Dash, K.; Thangavel, S.; Rao, Shodhan; Chandrasekaran, K.; Chaurasia, S.; Arunachalam, J.

doi:10.1016/j.chroma.2004.03.017

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…This, and other recent studies (e.g. Dash et al, 2004;Breiter and Muller, 2009), has shown that natural quartz may contain considerable amounts of P and B in the range of 0.1 -10 pg g-1 Phosphorus and B ions require charge neutrality in the quartz lattice. The coupled substitution of Al3+ + P5+ = Si4+ + Si4+, known as the berlinite substitution from feldspars (e.g.…”

Section: Discussionsupporting

confidence: 66%

Hydrogen speciation and trace element contents of igneous, hydrothermal and metamorphic quartz from Norway

Müller¹,

Koch‐Müller²

2009

Mineral. mag.

108

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Concentrations of a series of trace elements of 14 quartz samples from various geological settings (hydrothermal, igneous, metamorphic) in Norway were determined by LA-ICP-MS. FTIR spectroscopy was applied to the same quartz crystals in order to determine the H concentrations and the speciation of H in the quartz lattice. A refined hypothetical charge neutrality equation is suggested, where the atomic ratio of (Al3+ + Fe3+ + B3+) to (P5+ + H+ + Li+ + Na+ + K+) should correspond to 1 for natural quartz crystals. The determined concentrations of Al, Fe, B, P, Li, K and OH- species confirm approximately the charge neutrality equation. The high H/(Li+K+P) ion ratio of igneous quartz compared to hydrothermal and metamorphic quartz, suggests that igneous quartz preferentially incorporates H as OH- in lieu of Li, K and P. The results confirm that the FTIR absorption of the OH- band at 3595 cm-1 is attributed to structural B defects in the quartz lattice. The dominating H impurity in most of the quartz samples is, however, molecular H2O. The molecular H2O is presumably related to waterbearing micro pores and not to visible fluid inclusions, because the spectra were recorded from microscopically clear crystals.

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Section: Discussionsupporting

confidence: 66%

Hydrogen speciation and trace element contents of igneous, hydrothermal and metamorphic quartz from Norway

Müller¹,

Koch‐Müller²

2009

Mineral. mag.

108

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“…Phosphorous in these samples was determined photometrically with the molybdenum-blue method of Dick and Tabatabai (1977). A study by Dash et al (2004) reports 0.8 to 8 μg g -1 P in high-purity quartz using ion chromatography.…”

mentioning

confidence: 99%

Refinement of Phosphorus Determination in Quartz by LA‐ICP‐MS through Defining New Reference Material Values

Müller

Wiedenbeck

Flem

et al. 2008

Geostandard Geoanalytic Res

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The aim of this study was to improve the quality of laser ablation inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) determination of phosphorus in crystalline quartz. Over the last decade, the Geological Survey of Norway has routinely performed trace element determinations on quartz from both operating and potential quartz deposits by LA‐ICP‐MS. The determined phosphorus concentrations were, with but few exceptions, consistently within the range of 10 to 30 μg g−1, results that seemed to be both too high and too consistent. The multi‐material calibration curve obtained from a suite of reference materials (NIST SRM 610, 612, 614, 1830, BAM No. 1 amorphous SiO2 glass) did not define a precise regression line. Published phosphorus concentrations for the reference materials are poorly constrained and the observed dispersions along the multi‐material calibration curve suggest that some of the reference values may be inaccurate. Furthermore, the calibration curve did not pass through the origin of the [(cps 31P/cps 30Si) · cone. Si] vs. P concentration diagram; thus, in addition to the uncertainties of the literature values of phosphorus, it is difficult to define the calibration curve. Three reference materials (NIST SRM 614, 1830, synthetic quartz KORTH) were sent for phosphorus accelerator implantation, providing an independent and accurate (± 3%) approach for determining phosphorus concentrations in crystalline quartz. The intrinsic phosphorus concentrations of the three implanted samples plus those for NIST SRM 610 and 612 were determined by secondary ion mass spectrometry (SIMS), yielding new phosphorus values for NIST SRM 610, 612, 614 and 1830. Using these new values resulted in a better defined LA‐ICP‐MS calibration curve. However, the source of the ICP‐MS related background could not be defined, such that it must still be empirically corrected for.

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“…This also means that the analytical technique used for the nal measurement must be able to deal with a minimum volume of liquid, avoiding the need for a dilution step, and this condition is met by ETAAS. At rst glance, taking into account the thermal and atomic characteristics of mercury, this technique seems unsuitable, but the literature reports [31][32][33][34][35][36][37][38][39] that, by appropriate chemical modication, good sensitivity can be obtained. The next step was to optimize the ETAAS measurement of mercury and mercury organic compounds in the conditions used for desorbing the analytes from the collected nanocomposite.…”

Section: Preliminary Experiments: Optimization Of the Heating Programmentioning

confidence: 99%

Determination of ultratraces of mercury species using separation with magnetic core-modified silver nanoparticles and electrothermal atomic absorption spectrometry

López-Garcı́a

Vicente-Martínez

Hernández‐Córdoba

2015

J. Anal. At. Spectrom.

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Magnetic particles covered with functionalized silver nanoparticles are used in a micro-solid phase extraction procedure for the separation and preconcentration of mercury compounds. Functionalization with the sodium salt of 2-mercaptoethane-sulphonate (MESNa) allows Hg(II) ions to be adsorbed. WhenMESNa is replaced by L-cysteine, monomethyl mercury, dimethyl mercury, ethyl mercury, phenyl mercury and diphenyl mercury are also retained. After separation by means of a magnetic field, the analytes are released from the nanocomposites by treating with a small volume of a potassium iodide solution. Mercury is then measured by electrothermal atomic absorption spectrometry using silver nitrate and potassium permanganate solutions for chemical modification. The preconcentration factor is close to 200, and a detection limit of 0.01 mg L À1 mercury is achieved. The results for total mercury are verified using certified reference materials. Water and edible fish oils are analyzed for total mercury and for two fractions or mercury organic compounds with the help of a solid phase extraction cartridge.

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Ion chromatographic determination of trace level phosphorus in purified quartz

Cited by 9 publications

References 15 publications

Hydrogen speciation and trace element contents of igneous, hydrothermal and metamorphic quartz from Norway

Hydrogen speciation and trace element contents of igneous, hydrothermal and metamorphic quartz from Norway

Refinement of Phosphorus Determination in Quartz by LA‐ICP‐MS through Defining New Reference Material Values

Determination of ultratraces of mercury species using separation with magnetic core-modified silver nanoparticles and electrothermal atomic absorption spectrometry

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