Direct speciation analysis of Cr(VI) by electrothermal atomic absorption spectrometry, based on the volatilization of Cr(III)–thenoyltrifluoracetonate from the graphite furnace

Bermejo–Barrera, Pilar; Barciela‐Alonso, María Carmen; Pérez-Fernández, Begoña; Bermejo-Barrera, Adela

doi:10.1016/s0584-8547(02)00229-x

Cited by 28 publications

(14 citation statements)

References 28 publications

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“…Chromium is an indispensable nutrient element for the carbohydrates and lipids metabolism. While chromium(III) is considered to be essential nutrition and for the maintenance of normal glucose tolerance, chromium(VI) can have acute and chronic toxic, including carcinogenic effect [1,2]. Chromium is a major water pollutant, usually as a result of some industrial pollution including tanning factories, steel works, dyeing or chromium plating, wood preservation, etc.…”

Section: Introductionmentioning

confidence: 99%

Speciation of Cr(III) and Cr(VI) in environmental samples by solid phase extraction on Ambersorb 563 resin

Narin

Sürme

Soylak

et al. 2006

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Speciation of Cr(III) and Cr(VI) in environmental samples by solid phase extraction on Ambersorb 563 resin

Narin

Sürme

Soylak

et al. 2006

Journal of Hazardous Materials

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“…Operating parameters of graphite furnace were satisfactory to run different kinds of biological samples. Chemical modifiers have been used routinely in the determination of a large number of analytes by ETAAS (1,3,10,12,17,20 The results of the test indicate that the values found in the certified material were on the similar level. The method was validated in terms of the linearity, LOD, LOQ, precision, recovery, and uncertainty (7,8).…”

Section: Discussionmentioning

confidence: 99%

“…It occurs in the three most stable forms: as elemental chromium (chromium 0), trivalent chromium (chromium III), and hexavalent chromium (chromium VI). Elemental form of chromium does not occur naturally (3,9,21,24). Trivalent chromium has been considered as essential trace elements for the proper growth and development of humans and animals.…”

mentioning

confidence: 99%

Determination of Chromium in Biological Material by Electrothermal Atomic Absorption Spectrometry Method

Nawrocka

Szkoda

2012

Bulletin of the Veterinary Institute in Pulawy

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Procedure for determination of chromium in biological materials by Zeeman graphite furnace atomic absorption spectrometry method using a Perkin-Elmer spectrometer equipped with hollow-cathode lamp at 357.9 nm was developed. The samples of animal tissues, food, and feed were digested in muffle furnace at 450ºC. The ash was dissolved in 1 N hydrochloric acid and the final solution was diluted in 0.2% nitric acid. Magnesium nitrate (1%) was used as a matrix modifier. The method was validated in terms of basic analytical parameters. The mean recoveries of chromium was 84.4% for muscle, 79.0% for canned meat, and 80.2% for feed, and analytical detection limit was 0.003 µg/g. Certified reference materials were used for analytical quality assurance. The proposed analytical procedure is well adapted for monitoring chromium content in food and feedstuffs. Content of total chromium in the tested samples (animal muscles and liver) was low and was situated in the range of 0.031-0.101 mg/kg (muscles) and 0.047-0.052 mg/kg (liver).

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“…Among the instrumental techniques available, graphite furnace atomic absorption spectrometry (GF AAS) is still one of the most widely used for Cr determination in biological samples. 10,11 Particularly, AAS is a well--established analytical technique for chromium detection and speciation of Cr in biological materials using different approaches, such as selective volatilization as Cr(III)-thenoyltrifluoracetonate, 12 flow--injection on-line preconcentration on C18 mini-column, based on the selective formation of diethyldithiocarbanate complex of Cr(VI) in the 1-2 pH range and Cr(III) in the 4-9 pH range, 13 solid-phase extraction using ammonium pyrrolidinedithiocarbamate (APDC)-Cr(III) complex on Diaion HP-2MG resin, 14 Cr(III) extraction and preconcentration on silica gel chemically modified with Nb 2 O 5 15 and glass beads surface modified with 3-aminopropyl triethoxysilane (APTES) and glutaraldehyde for Cr(III)/Cr(VI) speciation in seawater. 16 Among the solid-phase extraction, silica organofunctionalized with APTES 17-21 and 3-(2-aminoethylamino) propyltrimethoxysilane (AAPTMS) 22 has been successfully used for separation and preconcentration of chromium species in different samples.…”

Section: Introductionmentioning

confidence: 99%

In vitro Cr(VI) speciation in synthetic saliva after releasing from orthodontic brackets using silica-aptes separation and GF AAS determination

et al. 2016

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A method for Cr(VI) speciation in synthetic saliva after releasing from orthodontic brackets, using silica nanoparticles organofunctionalized with (3-aminopropyl)triethoxysilane (APTES) for Cr(III)/Cr(VI) separation and GF AAS determination is proposed. Under the optimized conditions, Cr(VI) speciation was performed using 150 mg of silica organofunctionalized with 2.0% (v v -1 ) of APTES at pH 8. It was observed different sensitivity when calibrations of GF AAS were performed using Cr(III) or Cr(VI) as standard solutions. Consequently, calibrations using stoichiometric mixtures (Cr(III) + Cr(VI)) were used for total Cr determination and calibration using Cr(VI) was used only for the determination of this specie. The reliability of the proposed silica-APTES separation procedure and GF AAS determination was checked by addition of both species in synthetic saliva. Recoveries ranging from 97 to 110% were obtained. The repeatability, based on the relative standard deviation (RSD) inter days was less than 6%. A corrosion test was carried out on 20 orthodontic brackets from two different models, after immersion in synthetic saliva (pH=6.0) at 37 °C with agitation (125 rpm) for 24 h. It was observed that about 40% of the total chromium released from the analyzed orthodontic brackets was Cr(VI).

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Direct speciation analysis of Cr(VI) by electrothermal atomic absorption spectrometry, based on the volatilization of Cr(III)–thenoyltrifluoracetonate from the graphite furnace

Cited by 28 publications

References 28 publications

Speciation of Cr(III) and Cr(VI) in environmental samples by solid phase extraction on Ambersorb 563 resin

Speciation of Cr(III) and Cr(VI) in environmental samples by solid phase extraction on Ambersorb 563 resin

Determination of Chromium in Biological Material by Electrothermal Atomic Absorption Spectrometry Method

In vitro Cr(VI) speciation in synthetic saliva after releasing from orthodontic brackets using silica-aptes separation and GF AAS determination

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