Method for improving the sensitivity and reproducibility of hydride-forming elements by atomic absorption spectrometry

Parisis, Nicolaos E.; Heyndrickx, A

doi:10.1039/an9861100281

Cited by 12 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The silane solution reacts with hydroxyl groups, eliminating active sites on the glass surface, allowing the best sensitivity and repeat-E XPE RIM ENTA L ability of the desired reaction. 35 This treatment was repeated Apparatus after about 500 injections, and could be repeated as often as necessary. The BiH 3 atomization temperature was obtained The FI system is shown in Fig.…”

mentioning

confidence: 99%

Continuous Hydride Generation System for the Determination of Trace Amounts of Bismuth in Metallurgical Materials by Atomic Absorption Spectrometry Using an On-line Stripping-type Generator/Gas–Liquid Separator

Cadore¹,

Baccan²

1997

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

mentioning

confidence: 99%

Continuous Hydride Generation System for the Determination of Trace Amounts of Bismuth in Metallurgical Materials by Atomic Absorption Spectrometry Using an On-line Stripping-type Generator/Gas–Liquid Separator

Cadore¹,

Baccan²

1997

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

“…As(III) can be directly determined in 0.166 mol/L acetic acid by FI-HGAAS [7]; total As can only be determined after complete reduction of As(V) to As(III) with the help of 0.08 mol/L L-cysteine. As(V) is then calculated by the difference between both measurements.…”

Section: Interferencesmentioning

confidence: 99%

Differential determination of arsenic (III) and total arsenic with L-cysteine as prereductant using a flow injection non-dispersive atomic absorption device

Yin

Hoffmann

Lüdke

1996

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

Speciation of arsenic in environmental samples gains increasingly importance, as the toxic effects of arsenic are related to its oxidation state. A method was developed for the determination of trace amounts of arsenic (III) and total arsenic by flow injection hydride generation coupled with an in-house made non-dispersive AAS device. The total arsenic is determined after prereduction of arsenic (V) to arsenic (III) with L-cysteine in a low concentration of hydrochloric, acetic or nitric acid. The conditions for the prereduction, hydride generation and atomization were systematically investigated. A quartz tube temperature of 800 degrees C was found to be optimum in view of peak shape and baseline stability. Pb(II), Ni(II), Fe(III), Cu(II), Ag(I), Al(III), Ga(II), Se(IV), Bi(III) were checked for interfering with the 2 microg/L As(V) signal. A serious signal depression was only observed for Se(IV) and Bi(III) at a 150-fold excess. With the above system, arsenic was determined at a sampling frequency of about 1/min with a detection limit (3sigma) of 0.01 microg/L using a 0.5 mL sample. The reagent blank was 0.001+/-0.0003 absorbance units and the standard deviation of 10 measurements of the 2 microg/l As signal was found to be 1.2%. Results obtained for standard reference materials and water samples are in good agreement with the certified values and those obtained by ICP-MS

show abstract

“…Both traps were also packed with silanized glass wool. 20 All connections to the HG apparatus were m ade with Te¯on swagelok connectors and Te¯on tubing (1/4 in. o.d., Swagelok, Co. Solon, OH).…”

Section: Exp Erim Entalmentioning

confidence: 99%

Hydride Generation Laser-Induced Fluorescence of Arsenic and Selenium in the Inductively Coupled Plasma and Electrothermal Atomizer

et al. 2000

View full text Add to dashboard Cite

The application of hydride generation (HG) sample introduction combined with laser-induced fluorescence (LIF) detection in the inductively coupled plasma (ICP) and electrothermal atomizer (ETA) is reported. Far-ultraviolet excitation of As at 193.696 nm and Se at 196.026 nm is accomplished by using a tunable dye laser system with frequency doubling and stimulated Raman scattering. HG-ICP-LIF and HG-ETA-LIF techniques have been developed and demonstrate good sensitivity and good linearity at the ng/mL to sub-ng/mL level for both elements. The relative standard deviation of replicate measurements is on the order of 3–10% at the 5 ng/mL level for the HG-ICP-LIF technique and 5–35% at the 0.6 ng/mL level for the HG-ETA-LIF technique. Detection limits of 1 ng/mL (5 ng absolute mass) for As and 0.06 ng/mL (0.3 ng) for Se are reported for the HG-ICP-LIF technique and 0.04 ng/mL (0.2 ng) for As and 0.16 ng/mL (0.8 ng) for Se are reported for the HG-ETA-LIF technique. Lower than expected sensitivity and precision are observed in the ETA, which may be due to inefficient trapping of the hydrides in the procedure. Selective HG procedures have been demonstrated for the speciation and recovery of selected oxidation states of As and Se. The analytical capabilities of the HG-LIF techniques are compared to those of other HG techniques, and recommendations are made for improved performance of future HG-LIF approaches.

show abstract

Method for improving the sensitivity and reproducibility of hydride-forming elements by atomic absorption spectrometry

Cited by 12 publications

References 0 publications

Continuous Hydride Generation System for the Determination of Trace Amounts of Bismuth in Metallurgical Materials by Atomic Absorption Spectrometry Using an On-line Stripping-type Generator/Gas–Liquid Separator

Continuous Hydride Generation System for the Determination of Trace Amounts of Bismuth in Metallurgical Materials by Atomic Absorption Spectrometry Using an On-line Stripping-type Generator/Gas–Liquid Separator

Differential determination of arsenic (III) and total arsenic with L-cysteine as prereductant using a flow injection non-dispersive atomic absorption device

Hydride Generation Laser-Induced Fluorescence of Arsenic and Selenium in the Inductively Coupled Plasma and Electrothermal Atomizer

Contact Info

Product

Resources

About