Palladium and magnesium nitrates, a more universal modifier for graphite furnace atomic absorption spectrometry

Schlemmer, Gerhard; Welz, Bernhard

doi:10.1016/0584-8547(86)80175-6

Cited by 362 publications

(96 citation statements)

References 21 publications

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“…Plasma and whole blood samples were thawed at room temperature and diluted (1:3) using 0.1% Triton X-100 and 0.2% HNO 3 in deionized water. A Pd(NO 3 ) 2 matrix modifier solution containing 3000 mg/l Pd was prepared (Schlemmer and Welz, 1986). Mn determinations of whole blood and plasma were performed using a Perkin Elmer 4100ZL GF-AAS with Zeeman effect background correction using an adapted method of Luna and Campos (1999).…”

Section: Whole Blood and Plasma Analysismentioning

confidence: 99%

Influence of tea drinking on manganese intake, manganese status and leucocyte expression of MnSOD and cytosolic aminopeptidase P

et al. 2005

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Objective: Since black tea contains high levels of manganese (Mn), we investigated the relationship between dietary Mn intake, circulating Mn levels and leucocyte expression of two Mn-dependent enzymes in tea drinkers and non-tea drinkers. Design: We assessed Mn intakes (food frequency questionnaire), fasting whole blood and plasma Mn levels, and quantitative expression of peripheral blood mononuclear cell Mn-dependent superoxide dismutase (MnSOD) and cytosolic aminopeptidase-P (cAP-P). Setting and subjects: In total, 24 tea drinkers (X1 l black tea/day) and 28 non-tea drinkers were recruited from the staff and students of King's College London by circular email. Results: Dietary Mn intakes (mean (range)) were significantly lower (Po0.0001) in non tea drinkers (3.2 mg/day (0.5-6.5)) than tea drinkers (5.5 mg/day (2-12) or 10 mg/day (5-20) depending upon the value used for Mn levels of black tea). Whole blood, plasma Mn levels and expression of MnSOD and cAP-P did not differ between the groups. In a continuous analysis, whole blood Mn levels and expression of MnSOD correlated inversely but no other parameters associated with each other. Conclusions: Tea drinking is a major source of dietary Mn and intakes commonly exceed proposed adequate intake values of 1.8-2.3 mg Mn/day and, on occasion, exceed upper limits of 10-11 mg/day. Dietary Mn intake has little influence on markers of Mn status or expression of Mn-dependent enzymes. Fasting whole blood Mn levels and leucocyte expression of MnSOD could, together, be further investigated as markers of Mn status. Sponsporship: S-JH was supported through the EPSRC PTP scheme. Running costs were from the UK Technical Tea Trade Association.

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Section: Whole Blood and Plasma Analysismentioning

confidence: 99%

Influence of tea drinking on manganese intake, manganese status and leucocyte expression of MnSOD and cytosolic aminopeptidase P

et al. 2005

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“…Besides stabilization to higher thermal pretreatment temperature, the application of a modifier usually permits the use of higher atomization temperatures. 17 The influence of nickel and strontium nitrates mixed modifier on atomization temperature for a selenium determination seems to be uniformly in one direction, as can be seen in curve B and D in Fig. 1; namely, the integrated absorbances tend to decrease when atomization temperatures exceed 2300° C, and the lowest applicable temperature for atomization is 1900° C. The timeresolved absorbance profiles for selenium, as shown in Fig.…”

Section: Effectiveness Of Ni+sr As a Chemical Mod F Er For The Determmentioning

confidence: 84%

Nickel and Strontium Nitrates as Modifier for the Determination of Selenium in Urine by Zeeman Platform Graphite-Furnace Atomic Absorption Spectrometry

Liang

Mei²,

Rao³

1996

ANAL. SCI.

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“…Furthermore, the effect of modifier on determination of thallium was considered. Different recommended modifiers [38][39][40] such as palladium, sulfuric acid, ascorbic acid and palladium/ magnesium were also examined. It was found that Pd/Mg were the most suitable modifier for this purpose, which is consistent with the previous report.…”

Section: Resultsmentioning

confidence: 99%

“…It was found that Pd/Mg were the most suitable modifier for this purpose, which is consistent with the previous report. 38 With ascorbic acid, Pd, and H 2 SO 4 , the background absorption was high with wide peak, and the linearity of calibration graph was limited.…”

Section: Resultsmentioning

confidence: 99%

“…Pd/Mg modifier was prepared from palladium modifier solution for ETAAS and Mg (NO 3 ) 2 •6H 2 O according to reference. 37,38 Alumina (10-50 µm, γ-type chromatography grade) was purified by shaking with 5 mol L -1 nitric acid and washing three times with water. Sodium dodecyl sulfate (SDS), dibenzo-18-crown-6 (DB18C6) (Fluka) and 18-crown-6 (18C6) (Fluka) were used without further purification.…”

Section: Reagentsmentioning

confidence: 99%

See 1 more Smart Citation

Determination of thallium traces by ETAAS after on-line matrix separation and preconcentration in a flow injection system

Asadoulahi¹,

Dadfarnia²,

Shabani³

2007

J. Braz. Chem. Soc.

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Um sistema de injeção em fluxo sensível e simples foi desenvolvido para separação, pré-concentração e determinação de tálio. A pré-concentração é baseada na sorção do analito em uma microcoluna de dibenzo-18-coroa-6 (DB18C6) imobilizada em alumina revestida com surfactante e subseqüente eluição com solução de ácido nítrico (500 µL, 2 mol L -1 ). A concentração de tálio no eluente foi determinada por espectrometria de absorção atômica com atomização eletrotérmica. Os fatores que influenciaram a sorção e dessorção de íon tálio foram investigados. Para um volume da amostra de 5 mL, a calibração foi linear no intervalo de 0,1 a 20 µg L -1 (r = 0,9996) com um limite de detecção de 0,05 µg L -1 . A capacidade máxima de sorção foi de 1432 µg de tálio por grama do sorbente. A precisão do método para 1 µg L -1 foi 5,7% RSD (n = 11). O método foi aplicado para determinação de tálio em água, cabelo, unha e em materiais de referência certificados. A exatidão foi avaliada empregando experimentos de adição e recuperação ou por comparação dos resultados com materiais de referência certificados.A simple and sensitive flow injection system was developed for separation, preconcentration and determination of thallium. Preconcentration is based on the analyte sorption on a microcolumn of dibenzo-18-crown-6 (DB18C6) immobilized on surfactant coated alumina with subsequent elution using a nitric acid solution (500 µL, 2 mol L -1 ). The concentration of thallium in the eluent was determined using electrothermal atomic absorption spectrometry. Factors influencing the sorption and desorption of thallium ion were investigated. Using a sample volume of 5 mL, the calibration was linear from 0.1 to 20 µg L -1 range (r = 0.9996) with a detection limit of 0.05 µg L -1 . The maximum sorption capacity was 1432 µg of thallium per gram of sorbent. The precision of the method at 1 µg L -1 was 5.7% RSD (n = 11). The method was applied for determination of thallium in water, hair, nail, and standard reference samples. The accuracy was assessed using addition-recovery experiment or by comparison of the results with certified reference materials.

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Palladium and magnesium nitrates, a more universal modifier for graphite furnace atomic absorption spectrometry

Cited by 362 publications

References 21 publications

Influence of tea drinking on manganese intake, manganese status and leucocyte expression of MnSOD and cytosolic aminopeptidase P

Influence of tea drinking on manganese intake, manganese status and leucocyte expression of MnSOD and cytosolic aminopeptidase P

Nickel and Strontium Nitrates as Modifier for the Determination of Selenium in Urine by Zeeman Platform Graphite-Furnace Atomic Absorption Spectrometry

Determination of thallium traces by ETAAS after on-line matrix separation and preconcentration in a flow injection system

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