Simultaneous in-line concentration for spectrophotometric determination of cations and anions

Rocha, Fábio R.P.; Martelli, Patrícia Benedini; Reis, Boaventura F.

doi:10.1590/s0103-50532004000100008

Cited by 16 publications

(15 citation statements)

References 10 publications

(12 reference statements)

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“…These variables were selected to study considering that their combined effect could affect the performance of the procedure. Since this type of resin coupling was similar to that described in earlier works, 22,23 no experiment concerning to the use of the ion exchange resin column to separation the bromide ions from the sample matrix was carried out.…”

Section: General Commentsmentioning

confidence: 99%

Automatic flow analysis procedure for the determination of bromide in L-alanine by chemiluminescence detection

Borges¹,

Reis

2007

J. Braz. Chem. Soc.

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Um procedimento automático empregando sistema de análise em fluxo para determinação de brometo em aminoácido L-alanina empregando detecção por quimiluminescência é descrito. O procedimento foi baseado na oxidação do brometo por cloramina-T seguido pela reação com lominol. Fortificando amostras com solução padrão obteve-se recuperação na faixa de 94 a 106 %. Foram obtidas características importantes tais como: resposta linear na faixa de 0,01 até 1,000 mg L ; relative standard deviation of 3.0% (n = 10); sampling throughput of 18 determination per hour; and reagent consumption 0.07 mg luminol and 0.4 mg chloramine-T per determination were achieved.

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Section: General Commentsmentioning

confidence: 99%

Automatic flow analysis procedure for the determination of bromide in L-alanine by chemiluminescence detection

Borges¹,

Reis

2007

J. Braz. Chem. Soc.

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“…De fato, fotômetros simples, portáteis e de baixo custo, que empregam LED como fonte de radiação, têm sido desenvolvidos e usados em diversas aplicações analíticas [1][2][3][4][5][6][7] . Entre os fotômetros descritos na literatura, existem alguns que usam dois ou mais LEDs com máximos de emissão em diferentes comprimentos de onda, o que os tornam potencialmente aplicáveis a análises multicomponentes 2,8 .…”

Section: Diodos Emissores De Luz (Leds)unclassified

Um fotômetro multi-led microcontrolado, portátil e de baixo custo

Gaião¹,

Medeiros²,

Lyra³

et al. 2005

Quím. Nova

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“…This requisite could be easily achieved by implementing the analytical procedure in a flow system based on multicommutation process, which afforded ability to handle small volumes of sample and reagent solutions. 18 In this paper we intend to develop an automatic flow procedure based on multicommutation [19][20][21] for the determination of carbaryl in water. The procedure is based on the enzymatic reaction and detecting by chemiluminescence using an inexpensive instrument based on photodiode.…”

Section: Introductionmentioning

confidence: 99%

A chemiluminescence flow-based procedure for determination of carbaryl in natural waters exploiting multicommutation and enzymatic reaction

Pires¹,

Morales‐Rubio²,

Guárdia³

et al. 2007

J. Braz. Chem. Soc.

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Um procedimento empregando detecção quiluminescente para determinação de carbaril em águas naturais utilizando acetilcolinesterase e colina oxidase é descrito. O módulo de análise projetado para implementar o processo de multicomutação controlado por microcomputador foi constituído por cinco válvulas solenóides, duas colunas com enzimas imobilizadas em esferas de vidro e cela de fluxo para detecção de quimiluminescência. Nas melhores condições experimentais foi obtida faixa linear entre 25 a 700 μg L -1 de carbaril. Amostras de água foram fortificadas com carbaril e as recuperações variaram entre 95 e 101%. Limite de detecção e coeficiente de variação foram estimados em 11 μg L -1 (99,7% nível de confiança) e 1,3% (n = 20), respectivamente. Outras características analíticas tais como freqüência de amostragem de 72 determinações por hora, consumo de reagente de 2,1 mg de hexacianoferrato de potássio(III) e 0,069 mg de luminol por determinação, também, foram obtidas.A chemiluminescence procedure for the determination of carbaryl in natural waters using acetylcholinesterase and choline oxidase is described. The flow system designed to implement multicommutation approach controlled by microcomputer comprised five solenoid valves, two columns with immobilized enzymes on controlled pore glass beads and chemiluminometric flow cell. In the best experimental conditions a linear response ranging from 25 to 700 μg L -1 carbaryl was obtained. Water samples were spiked with carbaryl in order to access the accuracy and recoveries between 95 and 101% were obtained for a concentration level ranging from 25 to 100 μg L -1 carbaryl. Detection limit and variation coefficient were estimated as 11 μg L -1 (99.7% confidence level) and 1.3% (n = 20), respectively. Other profitable features such as a sample throughput of 72 determinations per hour, a reagent consumption of 2.1 mg potassium hexacyano ferrate(III) and 0.069 mg luminol per determination were also achieved.

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Simultaneous in-line concentration for spectrophotometric determination of cations and anions

Cited by 16 publications

References 10 publications

Automatic flow analysis procedure for the determination of bromide in L-alanine by chemiluminescence detection

Automatic flow analysis procedure for the determination of bromide in L-alanine by chemiluminescence detection

Um fotômetro multi-led microcontrolado, portátil e de baixo custo

A chemiluminescence flow-based procedure for determination of carbaryl in natural waters exploiting multicommutation and enzymatic reaction

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