Fresenius Journal of Analytical Chemistry
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#1Yiming FengH-Index: 1
#2Tingting HuH-Index: 1
Last. Fang JinH-Index: 1
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1 CitationsSource
Die Mesergebnisse der Analysentechnik, soweit sie auf Elementarereignissen beruhen, gehorchen der Poissonverteilung, die aus grundlegenden Pramissen abgeleitet wird. In der Praxis geht sie in eine singulare Normalverteilung uber. Durch die Kombination der Eigenschaften beider Verteilungen ist es moglich, einen Schnelltest auf statistische Reinheit einer Mesreihe aufzustellen, der Schlusse auf Vorhandensein und Art von Storungen der Meseinrichtung zulast. Die Kriterien zur Feststellung eines Gang...
#1Rudolf Book (University of Mainz)H-Index: 1
#2Syed Laik Ali (University of Mainz)H-Index: 5
Beim Extrahieren der Schmelzmassen von Sodaaufschlussen mit Wasser finden sich zahlreiche Elemente spurenweise im Filtrat. Die Ursache besteht vor allem im Durchlaufen feinkorniger Anteile durch die Filter.
1 CitationsSource
#1Harry Klich (BAM: Bundesanstalt für Materialforschung und -prüfung)H-Index: 4
#1Natividad García-Villar (University of Barcelona)H-Index: 7
#2Javier Saurina (University of Barcelona)H-Index: 33
Last. Santiago Hernández-Cassou (University of Barcelona)H-Index: 27
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A potentiometric sensor array has been developed for the determination of lysine in feed samples. The sensor array consists of a lysine biosensor and seven ion-selective electrodes for NH4 +, K+, Na+, Ca2+, Mg2+, Li+, and H+, all based on all-solid-state technology. The potentiometric lysine biosensor comprises a lysine oxidase membrane assembled on an NH4 + electrode. Because the selectivity of the lysine biosensor towards other cation species is not sufficient, there is severe interference wit...
22 CitationsSource
Analytical methodology currently employed for the determination of seven indicator PCBs in three compound feeds and fish meal has been evaluated in a collaborative study. The majority of the obtained relative standard deviations of the PCBs varied from 20 to 30%. On assuming a target relative standard deviation of 22% for the analytical results, statistical evaluation showed that about 80% of the participating laboratories delivered data within an acceptable range of ±44% of the assigned concent...
5 CitationsSource
#1A. G. S. Prado (State University of Campinas)H-Index: 1
#2C. Airoldi (State University of Campinas)H-Index: 1
The herbicide 2,4-dichlorophenoxyacetic acid (2,4-D), chemically anchored to a silica gel surface, was used to adsorb and preconcentrate the same herbicide from aqueous solutions at room temperature. From a series of adsorption isotherms adjusted to a modified Langmuir equation, the maximum number of moles adsorbed was calculated as 4.67×10–5 mol g–1, with the highest retention capacity at pH 5. This modified silica gel was used in a column for preconcentrating trace levels of 2,4-D. The preconc...
21 CitationsSource
#1Farzaneh Shemirani (UT: University of Tehran)H-Index: 53
#2Maryam Rajabi (UT: University of Tehran)H-Index: 27
A simple and sensitive method has been developed for species selective determination of chromium(III) and chromium(VI) in water by electrothermal atomic absorption spectrometry. The procedure is based on selective absorption of Cr(III) on a cellulose micro column (pH 11, 0.5 mol L–1 NaCl). Total chromium was subsequently determined after appropriate reduction of Cr(VI) to Cr(III). Recoveries of more than 97% were found. A concentration factor of 100 was achieved. The relative standard deviations...
34 CitationsSource
#1R. Lara (National University of San Juan)H-Index: 3
#2Rodolfo G. Wuilloud (National University of San Luis)H-Index: 40
Last. Luis D. Martinez (National University of San Luis)H-Index: 51
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An on-line cadmium preconcentration and determination system implemented with inductively coupled plasma optical emission spectrometry (ICP-OES) associated to flow injection (FI) with ultrasonic nebulization system (USN) was studied. The cadmium was retained as the cadmium-2-(5-bromo-2-pyridylazo)-5-diethylaminophenol, Cd-(5-Br-PADAP), complex, at pH 9.5. The cadmium complex was removed from the knotted reactor (KR) with 3.0 mol/L nitric acid. A total enhancement factor of 216 was obtained with ...
56 CitationsSource
#2T. Vu Duc (UNIL: University of Lausanne)H-Index: 6
Last. C. K. HuynhH-Index: 6
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A new method enabling the determination of 15 priority carcinogenic polyaromatic compounds (PAC) proposed by the US National Toxicology Program (NTP) has been developed and applied to diesel exhaust particulates (DEP). The clean-up procedure consists of solid-phase extraction (SPE) and HPLC fractionation on silica phases followed by liquid–liquid extraction and chromatography on a polyvinylbenzene copolymer column. The method gives good recoveries for all PAC studied except dibenzo[a,j]acridine ...
64 CitationsSource
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