Application of signal enhancement by easily ionized elements in hydride generation direct current plasma atomic emission spectrometric determination of arsenic, antimony, germanium, tin, and lead

Brindle, Ian D.; Le, X. C.

doi:10.1021/ac00185a026

Cited by 35 publications

(14 citation statements)

References 29 publications

(65 reference statements)

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“…In HGAAS it is found that reaction matrix, type of acid, buffers and the addition of certain reagents enhances the analyte signal to a considerable extent. Such a signal enhancement in the HGAAS was first reported by Boampong et al 124 Brindle et al 125 reported the use of L-cysteine in the determination of arsenic in HG-DCP-AES as a signal enhancer. A similar effect was also reported for Sn 126 and Ge.…”

Section: Effect Of the Reaction Matrix And Thiolsmentioning

confidence: 62%

“…It has also been reported that L-cysteine reduces the transition metal interference and acts as acid-base buffer, enhancing better stability of the hydrides. 132 Brindle et al 125 showed that there is a compound formed between NaBH4 and the SH group of L-cysteine, which may be the reagent, which is a more potent reducing agent than NaBH4 alone.…”

Section: Effect Of the Reaction Matrix And Thiolsmentioning

confidence: 99%

See 1 more Smart Citation

Mechanism of Volatile Hydride Formation and Their Atomization in Hydride Generation Atomic Absorption Spectrometry

Kumar

Riyazuddin

2005

ANAL. SCI.

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The mechanism of volatile hydride generation (HG) and the formation of analyte atoms in the quartz cell atomizer used in the determination of hydride-forming elements (As, Bi, Ge, Pb, Sb, Sn, Te etc.) by atomic absorption spectrometry (AAS), have been critically reviewed. The nascent hydrogen mechanism failed to explain hydride generation under different experimental conditions when tetrahydroborate (THB), amineboreanes (AB) and cyanotrihydroborate (CBH) were used as reductants. Various experimental evidence suggested a non-nascent hydrogen mechanism, in which the transfer of hydrogen directly bonded to boron to an analyte takes place. In electrochemical hydride generation (EcHG), the reduction of the analyte species and subsequent hydrogenation was proposed. The mechanism of analyte atom formation in a quartz tube atomizer has been explained by the following hypotheses: thermal decomposition, oxidation by 02 and collisions by hydrogen free radicals. The free-radical mechanism satisfactorily explains most of the analytical implications. The significant variation in the experimental conditions required to generate different analyte hydrides makes it difficult to arrive at a generalized mechanism of hydride formation.

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Section: Effect Of the Reaction Matrix And Thiolsmentioning

confidence: 62%

Section: Effect Of the Reaction Matrix And Thiolsmentioning

confidence: 99%

Mechanism of Volatile Hydride Formation and Their Atomization in Hydride Generation Atomic Absorption Spectrometry

Kumar

Riyazuddin

2005

ANAL. SCI.

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“…1989) and atomic spectrometry (Fazakas 1984; Nakata et al. 1988; Brindle and Le 1989; Brindle et al. 1989).…”

Section: Introductionmentioning

confidence: 99%

DETERMINATION OF TRACE AMOUNT FOR GERMANIUM (Ge) BY ATOMIC FLUORESCENCE SPECTROMETRY IN RICE (ORYZA SATIVA L.)

Jiang¹,

Shi²,

Wu³

2007

Journal of Food Quality

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The quantification of germanium in rice (Oryza sativa L.) was studied by atomic fluorescence spectrometry (AFS). The optimum experimental conditions or the generation of germanium hydride were 360‐V photomultiplier tube voltage, 80‐mA hollow cathode lamp, 2.5% (w/v) KBH4 in 0.5% KOH solution and 20% H3PO4 mixture with 5% H2SO4. With these experimental conditions, the correlation coefficient (R2) of calibration curve was up to 0.9992. As a convenient and sensitive calibration curve, it was proposed for the determination of trace amounts of germanium in brown and milled rice samples. The results showed that the content of germanium in brown rice was higher than that in milled rice. The means of the content of germanium were 4.98 and 18.10 ng/g in milled rice and brown rice, respectively. PRACTICAL APPLICATIONS Rice is an important food for human nutrition because it supplies starch, protein and the majority of micronutrients to humans, particularly in Asia. So determination the content of Germanium in rice is important for human health. In this study, we developed the method of AFS which was suitable for determination rice grain. With this method, the content of Ge could be analyzed accurately in rice, so that the good materials would be selected form germplasm resources of rice, which could be used to study physiological and genetic mechanisms and enhance germanium in diets for human.

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“…It is distributed in the crust in the form of silicate, sulfide, sulfate (Froelich and Andreae, 1981) and so on. At present, many methods, such as hydride generation-inductively coupled plasma-atomic emission spectrometry (HG-ICP-AES) (Jin et al, 1991;Ellchl, 1983;Brindle and Le, 1989;Ldszl6 et al, 2003;Bolea et al, 2004), x-ray fluorescence analysis (Haffer et al, 1997), 7-ray spectroscopy (Asador et al, 2001) and polarography (Shi and Jiao, 1996;Yang and Hu, 199i), are used to analyse trace germanium in environmental samples. HG-AFS is an effective method to analyse germanium.…”

Section: Introductionmentioning

confidence: 99%

Determination of trace germanium in marine sediments by hydride generation-atomic fluorescence spectrometry (HG-AFS)

Zhao

Zhang

et al. 2004

J Ocean Univ. China

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A method for the analysis of trace germanium in marine sediments by HG-AFS has been investigated. The experimental conditions such as the acidity of reduction reaction, the amount of sodium boro-hydride, the carrier gas flow rate, etc., were tested and optimized by using a kind of orthogonal design. The detection limit of the. presented method is 0.95ffgL ~ for germanium. The calibration curve shows a satisfactory line in the concentration range 0-320ffgL -~ Ge with a variation coefficient of _+ 2.1%.

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Application of signal enhancement by easily ionized elements in hydride generation direct current plasma atomic emission spectrometric determination of arsenic, antimony, germanium, tin, and lead

Cited by 35 publications

References 29 publications

Mechanism of Volatile Hydride Formation and Their Atomization in Hydride Generation Atomic Absorption Spectrometry

Mechanism of Volatile Hydride Formation and Their Atomization in Hydride Generation Atomic Absorption Spectrometry

DETERMINATION OF TRACE AMOUNT FOR GERMANIUM (Ge) BY ATOMIC FLUORESCENCE SPECTROMETRY IN RICE (ORYZA SATIVA L.)

Determination of trace germanium in marine sediments by hydride generation-atomic fluorescence spectrometry (HG-AFS)

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