نتایج جستجو برای: cold vapor atomic absorption spectrometry

تعداد نتایج: 433824  

2014
Seongbeom Cho David R Jacobs Kyong Park

BACKGROUND Prior studies focused on bioaccumulation of mercury (Hg) and on large, long-lived fish species as the major environmental source of Hg, but little is known about consumption of small-sized fish or about non-dietary determinants of circulating Hg levels. The purpose of this study was to evaluate whole blood mercury concentration (WBHg) and its major dietary and non-dietary correlates ...

Journal: :Environmental research 2000
M Vahter A Akesson B Lind U Björs A Schütz M Berglund

We have investigated exposure to methylmercury (MeHg) and mercury vapor (Hg0) in pregnant women and their newborns in Stockholm. The women were followed for 15 months post delivery. MeHg, inorganic Hg (I-Hg), and total Hg (T-Hg) in maternal and cord blood were determined by automated alkaline solubilization/reduction and cold vapor atomic fluorescence spectrometry. T-Hg in urine was determined ...

Journal: :Revista de salud publica 2014
Híver M Pérez-Vargas Jhon V Vidal-Durango José L Marrugo-Negrete

OBJECTIVE To assess the mercury accumulating capacity in contaminated soils from the community of Mina Santa Cruz, in the south of the department of Bolívar, Colombia, of the pepper plant (Capsicum annuum), in order to establish the risk to the health of the consuming population. MATERIALS AND METHODS Samples were taken from tissues (roots, stems, and leaves) of pepper plants grown in two soi...

2012
S. Mohamad Reza S. Hashtroudi

The concentrations of trace metals in hair of fishermen from the Persian Gulf region were assessed to detect the relationships between element levels in hair and potential factors influencing these relationships. The hair of 19 fishermen were sampled from six stations in the Persian Gulf (Abadan, Deylam, BushehrNirogah, Dayyer, Lengeh and Bandar Abbas in Khuzestan, Bushehr and Hormozgan provinc...

Journal: :Talanta 2007
Susana Río Segade Julian F Tyson

A novel method for preconcentration of methylmercury and inorganic mercury from water samples was developed involving the determination of ngl(-1) levels of analytes retained on the silica C(18) solid sorbent, previous complexation with ammonium pyrrolidine dithiocarbamate (APDC), by slurry sampling cold vapor atomic absorption spectrometry (SS-CVAAS) in a flow injection (FI) system. Several va...

2010
Claudia P. Peregrino Alma D. Rubio Myriam V. Moreno Silvia V. Miranda Luz O. Leal

Abstract: Mercury is considered one of the most toxic elements for plants and animals. Nevertheless, in the Middle East, Asia and Latin America, whitening creams containing mercury have been manufactured and purchased despite their confirmed health risks. Due to mass distribution, this can be considered a global public health issue. In Mexico, these products are widely available in pharmacies, ...

An amoniumvanadate plus sodium molybdate mixed modifier Graphite Furnace Atomic Absorption Spectrometric method has been developed for determination of traces of lead in drinking water. The concentration of lead in the sample is obtained by direct comparison to linear working graph prepared from aqueous standards in the modifier medium, The results indicate the better performance of the pro...

Journal: :physical chemistry and electrochemistry 0
masoomeh emadi young researchers and elite club, marvdasht branch, islamic azad university, marvdasht, iran mohammad alizare zare 1young researchers and elite club, marvdasht branch, islamic azad university, marvdasht, iran omran moradlou 2department of chemistry, college of sciences, alzahra university, tehran, iran maryam iranpour department of science and research branch, islamic azad university, fars, iran

a new and simple method followed by atomic absorption spectrometry has been developedfor indirect determination of ascorbic acid (aa). the proposed method was based on the oxidationof aa to dehydroascorbic acid with cu2+cation(200mgl-1)in an ammonium thiocyanatesolution atph2.4. aa reduces cu2+to cu+followed by the precipitation of cu+ with scn-. then, the excess ofcu2+in the solution was measu...

Journal: :Acta scientiarum polonorum. Technologia alimentaria 2013
Mirosław Mleczek Marek Siwulski Zygmunt Kaczmarek Iwona Rissmann Krzysztof Sobieralski Piotr Goliński

INTRODUCTION As regards a significant intake of wild growing edible mushrooms, especially in East and Central Europe, concentrations of toxic elements should be periodically analysed. The aim of the study was to assess changes in concentrations of selected trace elements (Ba, Cd, Co, Cu, Fe, Hg, Mn, Ni, Pb, Sr and Zn) in a mushroom species, Xerocomus badius. MATERIAL AND METHODS Xerocomus bad...

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