Electrochemical Modification of a Graphite Platform for a Solid Sampling Electrothermal Atomic Absorption Spectrometry of Mercury

ČERVENKA, Rostislav, Hana ZELINKOVÁ, Marie KONEČNÁ and Josef KOMÁREK. Electrochemical Modification of a Graphite Platform for a Solid Sampling Electrothermal Atomic Absorption Spectrometry of Mercury. Analytical Sciences. Tokyo: The Japan Soc. for Analytical Chemistry, 2010, vol. 26, No 9, p. 989-993. ISSN 0910-6340.

Basic information

• Original name: Electrochemical Modification of a Graphite Platform for a Solid Sampling Electrothermal Atomic Absorption Spectrometry of Mercury
• Authors: ČERVENKA, Rostislav (203 Czech Republic, belonging to the institution), Hana ZELINKOVÁ (203 Czech Republic, belonging to the institution), Marie KONEČNÁ (203 Czech Republic, belonging to the institution) and Josef KOMÁREK (203 Czech Republic, guarantor, belonging to the institution).
• Edition: Analytical Sciences, Tokyo, The Japan Soc. for Analytical Chemistry, 2010, 0910-6340.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10406 Analytical chemistry
• Country of publisher: Japan
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 1.465
• RIV identification code: RIV/00216224:14310/10:00047543
• Organization unit: Faculty of Science
• UT WoS: 000281921800011
• Keywords in English: noble-metals; chemical modifier; furnace; palladium; Hg; electrodeposition; performance; sediments; soils; tubes
• Tags: CHEMICAL MODIFIER, Electrodeposition, HG, NOBLE-METALS, palladium, performance, sediments, soils

Abstract

An electrodeposited palladium and iridium/gold mixture has been investigated as a chemical modifier for mercury determination in environmental samples by solid sampling electrothermal atomic absorption spectrometry. Electrochemical procedures of platform surface modification performed in a cell with 20 ml of solution, and in a drop of modifier solution have been optimized. Simple electrolysis in a drop was found to be the most consistent, taking the reproducibility as the major criterion. A total mass of 250 mu g of electrodeposited palladium or an iridium/gold mixture was used. The lifetime of 60 - 70 firings for a deposited iridium/gold mixture was smaller than that for palladium with a lifetime of 100 - 120 firings. The detection limit was 120 pg Hg. Different sample masses of between 0.1 and 10 mg were weighed into modified platforms according to the mercury content. The results obtained for mercury in environmental samples as soils, sediments and plant, using solid sampling and calibration against aqueous standards stabilized by potassium permanganate, were in good agreement with those achieved by using the thermal deposition of modifiers and with measurements by pyrolysis atomic absorption spectrometry with gold amalgamation.

Links

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)

• MUNI/A/0992/2009, interní kód MU: Name: Vývoj metodologie a instrumentace analytické chemie pro studium složení a vlastností přírodních a syntetických materiálů (Acronym: MIA)

Investor: Masaryk University, Category A