Improvements in graphite-furnace atomic-absoption microanalysis with solid sampling

Grobenski, Z.; Lehmann, R.; Tamm, Rolf; Welz, Bernhard

doi:10.1007/bf01196762

Cited by 36 publications

(4 citation statements)

References 3 publications

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“…The measurements using SS and electrothermal vaporization (ETV) ICP-MS were carried out with an Elan 6000 inductively coupled plasma mass spectrometer, equipped with an HGA-600 MS electrothermal vaporizer (Perkin-ElmerSCIEX, Thornhill, Canada), coupled to a solid sampler (Bodenseewerk Perkin-Elmer, Überlingen, Germany) that works similar to a syringe pipette [37], and the "cup-in-tube" technique described by Völlkopf et al [38]. The samples were directly introduced into quartz capillaries, weighed using an M2P microbalance (Sartorius) and transferred to pyrolytic graphite coated sample cups, which were introduced into the graphite tube (Perkin-Elmer, Norwalk, USA).…”

Section: Instrumentationmentioning

confidence: 99%

Strontium mono-chloride — A new molecule for the determination of chlorine using high-resolution graphite furnace molecular absorption spectrometry and direct solid sample analysis

Pereira

Welz

Lopéz

et al. 2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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A new method has been developed for the determination of chlorine in biological reference materials using highresolution continuum source graphite furnace molecular absorption spectrometry (HR-CS GF MAS) of the strontium mono-chloride (SrCl) molecule and direct solid sample analysis. The use of the SrCl molecule for high-temperature MAS was not described up to now in the literature. Preliminary time-dependent density functional theory calculations of the SrCl structure were carried out in order to obtain reasonable estimates of the absorption spectrum of the target molecule. The calculations, which were carried out at BHandHLyp/def2-QZVP level of theory, proved a very accurate and inexpensive way to get information about the spectrum of the SrCl molecule, which enabled us to perform the Cl determination with good sensitivity and specificity. The molecular absorption of the SrCl molecule has been measured using the wavelength at 635.862 nm, and zirconium and palladium have been evaluated as the chemical modifiers in order to increase the sensitivity of the gaseous SrCl molecule generated in the graphite furnace. The pyrolysis and vaporization temperatures were 600°C and 2300°C, respectively. Accuracy and precision of the method have been evaluated using biological certified reference materials of both animal and plant origins, showing good agreement with the informed and certified values. Limit of detection and characteristic mass were 1.0 and 2.2 ng, respectively. The results found using HR-CS GF MAS were in agreement (95% confidence level) compared to those obtained by electrothermal vaporization-inductively coupled plasma mass spectrometry.

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Section: Instrumentationmentioning

confidence: 99%

Strontium mono-chloride — A new molecule for the determination of chlorine using high-resolution graphite furnace molecular absorption spectrometry and direct solid sample analysis

Pereira

Welz

Lopéz

et al. 2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…A L'Vov platform was used (18). The introduction ofoxygen during the ash stage was evaluated and rejected (19)(20)(21).…”

Section: Determination Of Arsenic In Bloodmentioning

confidence: 99%

Arsenite as the Probable Active Species in the Human Carcinogenicity of Arsenic: Mouse Micronucleus Assays on Na and K Arsenite, Orpiment, and Fowler's Solution

Tinwell¹,

Stephens²,

Ashby³

1991

Environmental Health Perspectives

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Sodium arsenite, potassium arsenite, and Fowler's solution (arsenic trioxide dissolved in potassium bicarbonate) are equally active in the mouse bone marrow micronucleus assay ( 1 10 mg/kg by IPijection). The natural ore orpment (principally AS2S3) was inactive despite blood levels of arsenic of 300 to 900 ng/mL in treated mice at 24 hr. Sodium arsenite was active in three strains ofmice. It is suggested that the human lung cancer observed among arsenic ore smelters and the skin cancer among people exposed therapeutically to Fowler's solution, have, as their common origin, the genotoxic arsenite ion AsO;-. The difficulty experienced when attempting to demonstrate rodent carcinogenicity for derivatives of arsenic suggests that the bone marrow micronucleus assay may act as a useful assay for potentially carcinogenic arsenic derivatives.

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“…Direct injection of freeze-dried (1 l), powdered (12), -or untreated samples (8) has been used but problems with weighing of microgram test portions and with the ashing step make the procedure imprecise. Some of the weighing difficulties may be circumvented by injection of microliter volumes of slurries ~ -(13).…”

mentioning

confidence: 99%

Evaluation of homogeneity of marine biological tissues for lead and cadmium by GFAAS

Kratochvil¹,

Thapa²,

Motkosky³

1985

Can. J. Chem.

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Several marine biological tissues were tested for homogeneity with respect to lead and cadmium. The variance for the certified reference material TORT-1 is approximately 1 μg/g for each metal. This is of the same order as the heterogeneity of spray-dried dogfish and swordfish tissue. Scallop adductor muscle was of the same level of heterogeneity for cadmium; the lead content was below the limit of detection of the procedure used.

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Improvements in graphite-furnace atomic-absoption microanalysis with solid sampling

Cited by 36 publications

References 3 publications

Strontium mono-chloride — A new molecule for the determination of chlorine using high-resolution graphite furnace molecular absorption spectrometry and direct solid sample analysis

Strontium mono-chloride — A new molecule for the determination of chlorine using high-resolution graphite furnace molecular absorption spectrometry and direct solid sample analysis

Arsenite as the Probable Active Species in the Human Carcinogenicity of Arsenic: Mouse Micronucleus Assays on Na and K Arsenite, Orpiment, and Fowler's Solution

Evaluation of homogeneity of marine biological tissues for lead and cadmium by GFAAS

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