Optimization of Flame Atomic Absorption Spectrom- Etry With Preconcentration by Flow-Injection on-Line Sorbent Extraction of Cadmium and Lead in Biological Materials

Bruhn, C. G.; Vilches, Carolina; Cid, Hernán Fernández

doi:10.4067/s0366-16441999000300009

Cited by 4 publications

(7 citation statements)

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“…Upon comparing these results with those mentioned in previous published papers concerning on-line preconcentration coupled to flame AAS detection, a lower detection limit was reported for DDTC complexes sorbed on C18 columns 7,8 and for poly(aminophosphorous acid) chelating resin. 15 However, the value of EF achieved in the present work was much higher, which demonstrates the efficiency of this approach.…”

Section: Analytical Performancementioning

confidence: 71%

“…4 Among several preconcentration techniques, interactions based on chelate formation have received considerable attention in recent years due to their simplicity and ability to attain a high enrichment. 5,6 The complexing agents that have been mostly used for the on-line preconcentration of cadmium are diethyldithiocarbamate (DDTC) [7][8][9] and pyrrolidinedithiocarbamate (APDC). [10][11][12] The preconcentration of Cd(II) chelates with 1,10-phenanthroline was carried out using C60 fullerane microcolumn 10 and C18 sorbent material.…”

Section: Introductionmentioning

confidence: 99%

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Application of 5,10,15,20-Tetrakis(4-carboxyphenyl)porphine for Cadmium Preconcentration in Flow-Injection System

Kilian

Pyrzyńska

2002

ANAL. SCI.

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Section: Analytical Performancementioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Application of 5,10,15,20-Tetrakis(4-carboxyphenyl)porphine for Cadmium Preconcentration in Flow-Injection System

Kilian

Pyrzyńska

2002

ANAL. SCI.

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“…As mentioned, the FI conditions were optimized by a multivariate method using a factorial experimental design in two levels (high and low) and divided in three blocks for establishing the relative weight of the most important parameters [27]. Additional experiments with parameters set at the mean between the low and high values were performed in all cases.…”

Section: Resultsmentioning

confidence: 99%

“…Thereafter, the FI system was optimized using a multivariate method, based on a factorial experimental design in two levels and divided in three blocks to establish the most important parameters, which were further optimized in univariate mode [27]. In addition, the effect of the sample acidity was studied separately with the optimized FI conditions.…”

Section: Methodsmentioning

confidence: 99%

On-Line pre-concentration of Cr(III) and Mn(II) in FI-FAAS: A critical study involving interference effects and analytical use of an immobilized 8-hydroxyquinoline minicolumn

Bruhn

Pino

Campos

et al. 2002

Analytical and Bioanalytical Chemistry

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A flow injection system with a pre-concentration minicolumn based on a chelating resin was coupled to a flame atomic absorption spectrometer. The focus of this work was the investigation of interference effects and the analytical applicability of the azo-immobilized 8-hydroxyquinoline on controlled-pore glass for the determination of Cr and Mn in mussel and non-fat milk powder. All studied concomitants affected the retention of Cr(III). These effects are probably related to the formation of hydroxo-complexes at the optimum pH range 9.0-10. The positive effect caused by Ca(II) was exploited to increase the retention of Cr(III) species and to improve the slope by 70%. The interferences on Mn(II) retention were less severe. The quantification of Cr and Mn was performed by standard additions. The proposed methodology was validated by analysis of three certified reference materials of mussels (Cr and Mn) and non-fat milk powder (Mn) with a mean relative percent error of <6.5% and mean relative standard deviation of <13%. Chromium and Mn were determined in typical Chilean mussels samples, and Mn was determined in non-fat milk powder samples. Results agreed at the 95% confidence level with those obtained by electrothermal atomic absorption spectrometry (ETAAS) using graphite furnace atomization. The method detection limits for a 30 s pre-concentration time were 0.9 and 1.1 micro g L(-1) for Mn, and 2.2 and 2.5 micro g L(-1) for Cr in acid digested solutions of mussel and non-fat milk, respectively. The methodology is simple, fast (sampling frequency 60-72 h(-1)), reliable, of low cost, and can be applied to the determination of traces of Cr (> or =0.18 micro g g(-1)) and Mn (> or =0.6 micro g g(-1)) in mussel samples, and Mn (> or =0.37 micro g g(-1)) in non-fat milk powder.

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“…Eser miktarda metal iyonlarının tayin edilip arıtılmasında kullanılan yöntemlerin amacı, daha düşük analit derişimlerinin tayin edilebilmesi ve analitin matriks bileşenlerinden etkin bir biçimde ayrılmasıdır. Su ve sulu çözeltilerden ağır metal ve/veya metal iyonlarını arıtmak için kullanılan başlıca yöntemler i) iyon değiştirme yöntemi [4], ii) sıvı-sıvı ekstraksiyonu [5], iii) çöktürme [6] ve iv) yüzdürme [7] olarak sıralanabilir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Bi̇r Elektroki̇myasal İşleme Uygulamasinda Atik Elektroli̇tte Bakir İyonu (Cu2+) Tayi̇ni̇ Ve Aritimi

Ergin¹,

Onel²

2014

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETYeni bir elektrokimyasal işleme tezgahında bakır iş parçalarının işlenmesi sonrası ağır metal iyonları ile kirlenen elektrolitin sisteme yeniden beslenmeye hazır hale getirilmesi amacı ile tezgah çevre birimleri dahilinde arıtım yöntemleri incelenmiştir. Elektrokimyasal işleme (EKİ), metal bir parçanın yüzeyinin iyonlaştırma yöntemi ile işlenmesine ve metal iyonlarının elektrolit ile işleme bölgesinden uzaklaştırılmasına dayanmaktadır. Endüstriyel sularda bulunan ağır metal iyonlarının giderilmesi ve suların yeniden kullanıma hazır hale getirilmesi sistem verimliliğinin arttırılması ve çevre sağlığının korunması açısından önem taşımaktadır. Bu çalışmada, EKİ sonucu bakır iyonları ile kirlenen elektrolitin arıtılması için iyon değiştirme yöntemi tercih edilerek üç-aşamalı bir uygulama önerilmiştir. İyon değiştirici olarak birinci aşamada kağıt filtre, ikinci aşamada Türkiye'de yaygın rezervleri bulunan doğal bir zeolit ve son aşamada polimer bazlı katyon tutucu Lewatit TP 207 reçinesi kullanılmıştır. Bakır iyonları ile kirlenen elektrolitte zeolit ile iki saat etkileşim sonucu % 40, kağıt filtre ile üç kez filtreleme sonucu % 90, Lewatit TP 207 reçine kolonu ile işlem sonrası ise % 100 oranında arıtma sağlanmıştır.Anahtar Kelimeler: Ağır metal iyonu, İyon değiştirme, Metal işleme, Elektrokimyasal işleme DETERMINATION AND REMOVAL OF COPPER IONS (CU 2+ ) IN THE WASTE ELECTROLYTE IN AN ELECTROCHEMICAL MACHINING APPLICATION ABSTRACTWater treatment methods, as part of the peripheral units of a novel electrochemical machining device, were investigated with the aim of preparing the electrolyte, which was contaminated with heavy metal ions after machining of copper work pieces, for refeeding back to the system. Electrochemical machining (ECM) depends on machining the surface of a metal piece by ionization and removal of metal ions from the work area via the electrolyte. Removal of heavy metal ions in industrial waters and treatment of these waters for reuse is crucial in terms of increasing system efficiency and protecting environmental health. In this study, the ion exchange method was selected and a three-step application is proposed for the treatment of the electrolyte contaminated with copper ions after ECM. As the ion-exchanger, a paper filter was used in the first step, a natural zeolite with wide reserves in Turkey was used in the second step, and a polymer based cation exchange Lewatit TP 207 resin was used in the final step. Purification of the electrolyte, contaminated with copper ions, was achieved at 40 % as a result of treatment with the zeolite for two hours, at 90 % as a result of filtering three times using the paper filters, and at 100 % after treatment with the Lewatit TP 207 resin.

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Optimization of Flame Atomic Absorption Spectrom- Etry With Preconcentration by Flow-Injection on-Line Sorbent Extraction of Cadmium and Lead in Biological Materials

Cited by 4 publications

References 0 publications

Application of 5,10,15,20-Tetrakis(4-carboxyphenyl)porphine for Cadmium Preconcentration in Flow-Injection System

Application of 5,10,15,20-Tetrakis(4-carboxyphenyl)porphine for Cadmium Preconcentration in Flow-Injection System

On-Line pre-concentration of Cr(III) and Mn(II) in FI-FAAS: A critical study involving interference effects and analytical use of an immobilized 8-hydroxyquinoline minicolumn

Bi̇r Elektroki̇myasal İşleme Uygulamasinda Atik Elektroli̇tte Bakir İyonu (Cu2+) Tayi̇ni̇ Ve Aritimi

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