THE LOSS OF MERCURY due to volatilization and incomplete removal of oxidizing agents which destroy dithizone are among the major problems in determining mercury in urine. This paper describes a method by which these difficulties are reduced to a minimum. In actual use, this method has been found efficient in screening large numbers of workers exposed to a mercury hazard. Most methods require a ...

The electrochemical behavior of folic acid (FA) on a polished silver solid amalgam electrode (p-AgSAE), as a liquid mercury free electrode, has been studied in this paper. Differential pulse voltammetry (DPV) was found as a suitable method for voltammetric determination of folic acid. A limit of detection as 5.88 × 10-10 M (after 60 s of accumulation) was calculated for FA determination in an a...

1-(2-Pyridylazo-2-naphthol), PAN, has been introduced and extensively employed as a reagent in radioanalytical chemistry in our laboratories. An earlier communication dealt with the determination of micro amounts of Cu(II) by displacement of labelled zinc from Zn-PAN complexl'. The present work is intended to develop a similar method employing Zn-PAN complex for the determination of mercury(II)...

Organometallic compounds are widely used in almost all sectors of industry. as a result of emissions from natural and anthropogenic sources they are released to the environment, where they undergo a variety of conversions and interactions. some organometallic compounds exhibit high toxicity. organometallic compounds of mercury, tin, lead, selenium and arsenic are among the most common and hazar...

A sensitive method for the determination of the herbicide pindone by adsorptive stripping voltammetry using a hanging mercury drop electrode at pH 4.0 was described. The cyclic voltammogram of pindone demonstrates that compound was adsorbed at the surface of mercury electrode, and the overall reduction process was under controlled diffusion. The adsorptive peak was observed at −0.3 V, and peak ...

SHISHIDO , S. and SUZUKI, T. Mercury in Human Hair: A Comparative Study by Using Two Different Methods of Atomic Absorption and Neutron Activation Analysis. Tohoku J. exp. Med., 1974, 113 (4), 351-356 Magos (1971) reported a new method of atomic absorption spectrometry for selective and simple determination of inorganic and organic mercury. To investigate the reliability of Magos's method, the ...

A simple and rapid ultrasound assisted extraction (UAE) protocol with dilute solutions of tetramethylammonium hydroxide (TMAH) for the speciation of mercury in fish and plant tissues was developed as an alternative to conventional methods which require intensive treatments. The main operational parameters, such as extractant concentration (TMAH), sonication time and amount of sample, were optim...

We thank Mr. José G. Dórea for his interest in our article Total mercury content in canine hair before and after administration of vaccines containing thiomersal, which deals with the determination of total mercury in hair of dogs after administration of thiomersal-containing vaccine (TCV) with ethylmercury as active substance. We thank him, in particular, for very inspiring and valuable commen...

Urban, B.K. (Eds.), Horizonte 2000, 6. Wolfgang Ostwald Kolloqium der Kolloid-Gesellschaft Forschungszentrum Juelich, Band 9, 1998, p. 110. Kwokal, Z., Branica, M., 2000. Determination of dissolved monomethyl-mercury in saline, estuarine and freshwaters in Croatia. Croat. Chem. Acta 73, 97–109. Kwokal, Z., Branica, M., 2001. Occurrence of dimethylmercury in the polluted part of Ka stela Bay. Ra...

a facile and highly efficient method have been developed for the preconcentration of the mercury content in crude oil and gasoline samples after digestion with microwave-assisted digestion. octadecyl silica membrane disk has been modified by the recently synthesized triazene ligand, (e)-1-(2-ethoxyphenyl)-3-(4-nitrophenyl) triaz-1-ene (ent), then the modified membrane was used for the preconcen...