Voltammetric Determination of Low‐Molecular‐Weight Sulfur Compounds in Hydrothermal Vent Fluids – Studies with Hydrogen Sulfide, Methanethiol, Ethanethiol and Propanethiol

Abstract

Determination of sulfide compounds in hydrothermal vent fluid samples was performed by DPCSV. The methodology was applied to speciate sulfides via primitive and first-derivative curve interpretation. Hydrogen sulfide, methanethiol, and propanethiol were simultaneously assayed in samples containing no ethanethiol. In the presence of ethanethiol, the organic sulfides were determined without speciation. Sulfides were determined in an acidic electrolyte, and detection limits ranging from 0.1 to 1.1 mmol L À1 were calculated. The method was tested in real hydrothermal vent fluid samples, with recoveries ranging from 86.9% (R -SH) to 115.3% (H 2 S). Interference of the metallic species present in seawater was investigated.

Qualitative and Quantitative Content Determination of Macro-Minor Elements in Bryonia Alba L. Roots using Flame Atomic Absorption Spectroscopy Technique

“…Moreover, trace elements play an important role in the formation of bioactive chemical constituents in medicinal herb plants and thus are responsible for their medicinal and toxic properties accordingly. 6,7 Several number of techniques such as voltammetery, atomic absorption spectrometry (AAS), 8 inductively coupled plasma atomic optical emission spectrometry (ICP-OES), 9 X-ray fluorescence (XRF), 10 differential pulse cathode stripping voltamperometry (DPCSV) 11 and instrumental neutron activation analysis (INAA) 12 are normally used for the determination of trace elements in medicinal herbal plants. Because of its specificity, sensitivity, high precision, simplicity, rapid analysis, low cost, low detection limit, and wide linear range, AAS is the most widely recommended instrument used in analytical procedures for the trace metal analysis found in complex biological samples.…”

Controlled‐Potential‐Based Electrochemical Sulfide Sensors: A Review

“…Daiane et al. carried out the determination of H 2 S, MtSH, EtSH, and PrSH (generically termed “sulfides”) by differential pulse cathodic stripping voltammetry (DPCSV) in an acidic supporting electrolyte, directly on the samples without stabilization by sulfide precipitation at the mercury dropped electrode (MDE) [102] . In this procedure, anodic reactions throughout the accumulation of sulfide yielded poorly soluble mercury–sulfur compounds because of the oxidation of mercury.…”

“…electrode (MDE). [102] In this procedure, anodic reactions throughout the accumulation of sulfide yielded poorly soluble mercury-sulfur compounds because of the oxidation of mercury. Throughout cathodic stripping voltammetry, these resultant mercury-sulfur compounds were reduced at the surface of MDE, which produced voltammetric peaks at various potentials for sulfides.…”

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“…For the determination of trace elements in medicinal herbal plants, a variety of techniques such as voltammetry, atomic absorption spectrometry (AAS) 12 , inductively coupled plasma atomic optical emission spectrometry (ICP-OES), X-ray fluorescence (XRF) 13 , differential pulse cathode stripping voltamperometry (DPCSV) 14 , and instrumental neutron activation analysis (INAA) 15 Furthermore, all additional compounds used were of analytical quality.…”