Permanent modification in electrothermal atomic absorption spectrometry — advances, anticipations and reality

Tsalev, Dimiter L.; Slaveykova, Vera I.; Lampugnani, Leonardo; D’Ulivo, Alessandro; Georgieva, R.

doi:10.1016/s0584-8547(00)00194-4

Cited by 104 publications

(45 citation statements)

References 65 publications

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“…In order to reduce the major interferences caused in real samples, we performed further investigations to find an effective chemical modifier. Tsalev et al 12 proposed a systematic review and detailed discussion on the characteristic features of chemical modifiers used in ETAAS. Volynsky 13 gave a critical review on the investigation of the mechanism of chemical modifiers.…”

Section: 7-9mentioning

confidence: 99%

Determination of Cadmium, Chromium, Copper and Lead in Sediments and Soil Samples by Electrothermal Atomic Absorption Spectrometry Using Zirconium Containing Chemical Modifiers

Acar

2006

ANAL. SCI.

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Section: 7-9mentioning

confidence: 99%

Determination of Cadmium, Chromium, Copper and Lead in Sediments and Soil Samples by Electrothermal Atomic Absorption Spectrometry Using Zirconium Containing Chemical Modifiers

Acar

2006

ANAL. SCI.

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“…The curve was obtained from 10 calibration plots, ranging from 0.01 to 3.33 µg L −1 . As shown in Table 2 It is well known that the high temperature applied for the Cd pyrolysis decreases the lifetime of graphite tubes as well as the corrosive action of some modifiers [42]. The lifetime of the graphite tube using the chemical modifier and the high temperature conditions was around 650 firings.…”

Section: Analytical Figures Of Meritmentioning

confidence: 95%

Minimizing Chloride Interferences Produced by Calcium Chloride in the Determination of Cd by Graphite Furnace Atomic Absorption Spectrometry

Waterlot

Douay

2012

ISRN Spectroscopy

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Cadmium concentrations in CaCl 2 extracting solutions at various concentrations were determined by graphite furnace atomic absorption using two background correctors: the deuterium and the high-speed self-reversal background correction systems. Under-and overestimation of the Cd absorbance signals in CaCl 2 solutions were observed for concentrations greater than 0.005 M using the deuterium lamp while no important effect was observed using the other background correction system. The analytical performance of the spectrometer for the determination of Cd was studied in 0.01 M CaCl 2 solution and single extractions were performed using reference materials and contaminated soil samples. Cadmium was determined using the two background correction systems and a third method, which consists of the use of the deuterium lamp without any chemical modifier, was added to the study. The results showed that the third method was unable to determine Cd concentrations in the CaCl 2 solution due to the presence of extractable arsenic and iron. For solutions without any dilution or diluted with a very low dilution factor, the CaCl 2 -extractable Cd concentrations measured using the deuterium lamp were systematically below those found using the high-speed self-reversal method. These differences were explained by the presence of chloride ions in the atomization step.

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“…8 The use of a permanent modifier simplifies the procedure compared to the addition of a modifier in solution to each sample aliquot. 1,19 According to a study, 9 the permanent chemical modifiers can be used for direct SS-ETAAS, despite the sample not being in intimate contact with the modifier. A straightforward procedure was proposed for the determination of mercury in biological materials using solid sampling and high-resolution continuum source electrothermal atomic absorption spectrometry (HR-CS-ETAAS) in a graphite tube with calibration against aqueous standards stabilized by potassium permanganate, with the elimination of the pyrolysis stage and without the use of any chemical modifiers of the platform surface.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Modification of a Graphite Platform for a Solid Sampling Electrothermal Atomic Absorption Spectrometry of Mercury

et al. 2010

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An electrodeposited palladium and iridium/gold mixture has been investigated as a chemical modifier for mercury determination in environmental samples by solid sampling electrothermal atomic absorption spectrometry. Electrochemical procedures of platform surface modification performed in a cell with 20 ml of solution, and in a drop of modifier solution have been optimized. Simple electrolysis in a drop was found to be the most consistent, taking the reproducibility as the major criterion. A total mass of 250 μg of electrodeposited palladium or an iridium/gold mixture was used. The lifetime of 60 -70 firings for a deposited iridium/gold mixture was smaller than that for palladium with a lifetime of 100 -120 firings. The detection limit was 120 pg Hg. Different sample masses of between 0.1 and 10 mg were weighed into modified platforms according to the mercury content. The results obtained for mercury in environmental samples as soils, sediments and plant, using solid sampling and calibration against aqueous standards stabilized by potassium permanganate, were in good agreement with those achieved by using the thermal deposition of modifiers and with measurements by pyrolysis atomic absorption spectrometry with gold amalgamation.

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Permanent modification in electrothermal atomic absorption spectrometry — advances, anticipations and reality

Cited by 104 publications

References 65 publications

Determination of Cadmium, Chromium, Copper and Lead in Sediments and Soil Samples by Electrothermal Atomic Absorption Spectrometry Using Zirconium Containing Chemical Modifiers

Determination of Cadmium, Chromium, Copper and Lead in Sediments and Soil Samples by Electrothermal Atomic Absorption Spectrometry Using Zirconium Containing Chemical Modifiers

Minimizing Chloride Interferences Produced by Calcium Chloride in the Determination of Cd by Graphite Furnace Atomic Absorption Spectrometry

Electrochemical Modification of a Graphite Platform for a Solid Sampling Electrothermal Atomic Absorption Spectrometry of Mercury

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