"Direct Determination of Arsenic in Beer by Electrothermal Atomic Absorption Spectrometry with Deuterium Background Correction (D-2-ET-AAS)"@en . "25310" . "Byla pops\u00E1na metoda pro p\u0159\u00EDm\u00E9 stanoven\u00ED As v pivu metodou D2-ET-AAS. Pro stanoven\u00ED bylo doporu\u010Deno pou\u017E\u00EDt kyvety s integrovanou platformou, palladia jako chemick\u00E9ho modifik\u00E1toru a vlo\u017Eit krok chlazen\u00ED p\u0159ed krok atomizace. Vlo\u017Een\u00ED kroku chlazen\u00ED vedlo ke zv\u00FD\u0161en\u00ED citlivosti pro m\u011B\u0159en\u00ED z v\u00FD\u0161ky p\u00EDku o 40 %. Bylo pozorov\u00E1no, \u017Ee Pd je ve srovn\u00E1n\u00ED s Ni a sm\u011Bs\u00ED Pt s kyselinou citronovou mnohem \u00FA\u010Dinn\u011Bj\u0161\u00ED pro potla\u010Den\u00ED interference fosfore\u010Dnan\u016F. V p\u0159\u00EDtomnosti Pd bylo rovn\u011B\u017E dosa\u017Eeno nejvy\u0161\u0161\u00ED teploty termick\u00E9 \u00FApravy 1500 \u00B0C. P\u0159\u00EDdavek dal\u0161\u00EDch modifik\u00E1tor\u016F, jako nap\u0159. V, Mg \u010Di Sr nem\u011Bl na hodnotu teploty termick\u00E9 \u00FApravy vliv. Za optimalizovan\u00FDch pracovn\u00EDch podm\u00EDnek byl vliv matrice na stanoven\u00ED As v pivu shled\u00E1n jako nev\u00FDznamn\u00FD a pro stanoven\u00ED bylo mo\u017En\u00E9 pou\u017E\u00EDt metody p\u0159\u00EDm\u00E9 kalibrace. Spr\u00E1vnost vypracovan\u00E9 metodiky byla ov\u011B\u0159ena pomoc\u00ED certifikovan\u00FDch referen\u010Dn\u00EDch materi\u00E1l\u016F a pomoc\u00ED referen\u010Dn\u00ED techniky ICP-oa-TOFMS."@cs . "Food Chemistry" . . . . . "Direct Determination of Arsenic in Beer by Electrothermal Atomic Absorption Spectrometry with Deuterium Background Correction (D-2-ET-AAS)"@en . "We describe here a method for the direct determination of As in beer by D-2-ET-AAS, using Pd modifier, the atomization from platform and insertion of a cooling step before atomization. This method results in a 40% increase of sensitivity in peak-height measurements. I'd was found to be the most advantageous chemical modifier for the elimination of phosphate interference compared to Ni or Pt + citric acid. In addition, Pd is able to stabilize As at charring temperatures of 1500 degrees C and further addition of V, Mg or Sr have no influence. Addition of the modifier to standards and samples made possible the use of matrix-free standard solutions for attaining accurate analysis of diluted samples. The accuracy was checked by the comparison of results of direct analysis of beer samples by the proposed method with those found for microwave-digested samples measured by an inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometer (ICP-oa-TOFMS) method. The accuracy was also co"@en . "P\u0159\u00EDm\u00E9 stanoven\u00ED arzenu v piv\u011B metodou atomov\u00E9 absorp\u010Dn\u00ED spektrometrie s elektrotermickou atomizac\u00ED na instrumentaci vybaven\u00E9 deuteriovou korekc\u00ED pozad\u00ED (D2-ET-AAS)"@cs . . "1" . . . "[631664441218]" . "417443" . "Z(MSM0021627502)" . . . . . "286-292" . . "Hus\u00E1kov\u00E1, Lenka" . . "Arsenic; ET-AAS; beer; background correction; cool-down step"@en . "RIV/00216275:25310/07:00006224!RIV08-MSM-25310___" . . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "We describe here a method for the direct determination of As in beer by D-2-ET-AAS, using Pd modifier, the atomization from platform and insertion of a cooling step before atomization. This method results in a 40% increase of sensitivity in peak-height measurements. I'd was found to be the most advantageous chemical modifier for the elimination of phosphate interference compared to Ni or Pt + citric acid. In addition, Pd is able to stabilize As at charring temperatures of 1500 degrees C and further addition of V, Mg or Sr have no influence. Addition of the modifier to standards and samples made possible the use of matrix-free standard solutions for attaining accurate analysis of diluted samples. The accuracy was checked by the comparison of results of direct analysis of beer samples by the proposed method with those found for microwave-digested samples measured by an inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometer (ICP-oa-TOFMS) method. The accuracy was also co" . "P\u0159\u00EDm\u00E9 stanoven\u00ED arzenu v piv\u011B metodou atomov\u00E9 absorp\u010Dn\u00ED spektrometrie s elektrotermickou atomizac\u00ED na instrumentaci vybaven\u00E9 deuteriovou korekc\u00ED pozad\u00ED (D2-ET-AAS)"@cs . "7"^^ . . "0308-8146" . "4"^^ . . "Direct Determination of Arsenic in Beer by Electrothermal Atomic Absorption Spectrometry with Deuterium Background Correction (D-2-ET-AAS)" . . "RIV/00216275:25310/07:00006224" . "105" . "3"^^ . "\u010Cernohorsk\u00FD, Tom\u00E1\u0161" . . "\u0160r\u00E1mkov\u00E1, Jitka" . "Direct Determination of Arsenic in Beer by Electrothermal Atomic Absorption Spectrometry with Deuterium Background Correction (D-2-ET-AAS)" . . "Vavru\u0161ov\u00E1, Lenka" .