The determination of selenium in sediments using hydride generation ICP-MS

McCurdy, Ed; Lange, Jörg; Haygarth, P. M.

doi:10.1016/0048-9697(93)90283-c

Cited by 17 publications

(9 citation statements)

References 1 publication

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“…Hydride stability was improved by removing waste liquid as a batch at the end of the sample analysis and minimized analyte hydride gas loss via continuous peristaltic pumping, similar to Wolnik et al 23 Memory effects and hydride stability were also improved by not incorporating a microporous polytetrafluoro-ethylene (PTFE) membrane at the CHG-ICP interface as in previous studies. 16,17,[24][25][26][27] Standard solutions and reagents Ar (99.999% purity, Air Liquide, TX) was used as a plasma gas and Ar/H 2 mixture (99.999% purity, 5% H 2 95% Ar, Air Liquide, TX), CH 4 (99.999% purity, Scott Speciality Gases, TX), and NH 4 (99.999% purity, Scott Speciality Gases, TX) were tested in the DRC as potential reaction gases.…”

Section: Experimental Instrumentationmentioning

confidence: 99%

“…Waste drainage at the end of each analysis (rather than continuous waste pumping), resulted in a less pulsed and more stable ion signal. However, continued reagent reaction with sample acid results in production of excess hydrogen 23,26,30,35 and suppression of the ion signal with time, which is most notable at the highest intensity m/z 80. Precise computer-controlled timing (AE500 ms) of reagent and acidified sample mixing within the CHG allowed accurate replication of samples (Fig.…”

Section: Continuous-gas-hydride Analysismentioning

confidence: 99%

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Determination of selenium isotopic ratios by continuous-hydride-generation dynamic-reaction-cell inductively coupled plasma-mass spectrometry

Layton‐Matthews

Leybourne

Peter

et al. 2006

J. Anal. At. Spectrom.

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The goal of this study was to develop an accessible method for the determination of selenium isotopes within selenium-rich geological samples and examine the influence of sample introduction, instrumental parameters, column separation and the application of standard-sample bracketing for mass bias and drift correction. Quantitative selenium separation and enrichment of samples was achieved by a column separation using 0.2 g thioglycollic impregnated cotton fiber prior to introduction of the sample to an ICP-DRC-MS. 0.6 ml min À1 premixed Ar (95%) þ H 2 (5%) was favored over CH 4 and NH 4 as a reaction cell gas and was used within the DRC coupled with optimized DRC rejection parameters RPa (0) and RPq (0.65) to effectively reduce the signal to background ratio of all measured selenium isotopes (m/z 76, 77, 78, 80 and 82). Ion signal intensity of all measured selenium isotopes were increased 100 fold over classic nebulization by mixing of 1% NaBH 4 and acidified sample digestions in a membrane-less computer-controlled continuous hydride generator. Transient hydride ion signals were time-averaged for five readings and three replicates to produce an in-run precision (2s) of AE0.45% d 82/76 Se Merck (relative to a Merck titrosol ICP-MS standard) and AE0.85% d 82/76 Se Merck over an 18 month period. In the absence of a selenium isotopic standard, the accuracy of the method was determined using four interlaboratory solutions and five geological standard reference materials covering 0 to À4.5% d 82 /76 Se Merck . Our results indicate excellent reproducibility within method precision. The minimum mass of Se required for isotopic ratio determination was 3 mg (4100 000 cps at m/z 82 and 76).

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Section: Experimental Instrumentationmentioning

confidence: 99%

Section: Continuous-gas-hydride Analysismentioning

confidence: 99%

Determination of selenium isotopic ratios by continuous-hydride-generation dynamic-reaction-cell inductively coupled plasma-mass spectrometry

Layton‐Matthews

Leybourne

Peter

et al. 2006

J. Anal. At. Spectrom.

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“…The application of hydride-generation inductively coupled plasma mass spectrometry to determine selenium in soils has also been discussed by McCurdy et al 301 Selenium is discussed further in Section 8.59.…”

Section: Inductively Coupled Plasma Atomic-emission Spectrometrymentioning

confidence: 97%

Determination of Metals in Soils

Crompton

2015

Determination of Metals in Natural Waters, Sediments and Soils

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“…Thus a sensitive method of determining selenium is necessary for studying diseases involving lack of selenium or its excess. The analytical methods most often used to determine traces of selenium in environmental samples are atomic absorption spectrometry (AAS) [4,5], inductively coupled plasma atomic emission spectrometry (ICP-AES) [6], inductively coupled plasma mass spectrometry (ICP-MS) [7], neutron activation analysis [8], voltammetry [9]. In case of voltammetry used are stripping methods such as anodic stripping voltammetry (ASV) at gold [10 -12] and carbon electrodes [13], adsorptive stripping voltammetry [14,15] and cathodic stripping voltammetry (CSV) at copper microelectrode [16], copper-modified mercury-film electrode [17], hanging copper amalgam drop electrode [18], ceramic composite electrode [19] or silver disk electrode [20].…”

Section: Introductionmentioning

confidence: 99%

Determination of Selenium Traces on Cyclic Renewable Mercury Film Silver Electrode in Presence of Copper Ions Using Cathodic Stripping Voltammetry

Piech

2008

Electroanalysis

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The new cyclic renewable mercury film silver based electrode (Hg(Ag)FE), applied for the determination of selenium(IV) traces in the presence of copper ions using differential pulse cathodic stripping voltammetry (DP CSV) is presented. The preparation of the Hg(Ag)FE is very simple. The effects of various factors such as: preconcentration potential and time, pulse height, step potential and supporting electrolyte composition are optimized. The calibration graph is linear from 0.5 nM (39 ng L À1) to 100 nM (7.9 mg L À1) for a preconcentration time of 45 s, with correlation coefficient of 0.9995. For a Hg(Ag)FE with a surface area of 8 mm 2 the detection limit for a preconcentration time of 90 s is as low as 17 ng L À1 . The repeatability of the method at a concentration level of the analyte as low as 2 mg L À1 , expressed as RSD is 2.7% (n ¼ 7). The proposed method was successfully applied and validated by studying the certified reference material (bovine liver BCR-185) and simultaneously recovery of Se(IV) from spiked water samples.

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The determination of selenium in sediments using hydride generation ICP-MS

Cited by 17 publications

References 1 publication

Determination of selenium isotopic ratios by continuous-hydride-generation dynamic-reaction-cell inductively coupled plasma-mass spectrometry

Determination of selenium isotopic ratios by continuous-hydride-generation dynamic-reaction-cell inductively coupled plasma-mass spectrometry

Determination of Metals in Soils

Determination of Selenium Traces on Cyclic Renewable Mercury Film Silver Electrode in Presence of Copper Ions Using Cathodic Stripping Voltammetry

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