Determination mercury

Smith [113] studied the adsorption of n-pentane on mercury, determining both the surface tension change and the ellipsometric film thickness as a function of the equilibrium pentane pressure. F could then be calculated from the Gibbs equation in the form of Eq. ni-106, and from t. The agreement was excellent. Ellipsometry has also been used to determine the surface compositions of solutions [114,115], as well polymer adsorption at the solution-air interface [116]. 

This method is used for the determination of total chromium (Cr), cadmium (Cd), arsenic (As), nickel (Ni), manganese (Mn), beiylhum (Be), copper (Cu), zinc (Zn), lead (Pb), selenium (Se), phosphorus (P), thalhum (Tl), silver (Ag), antimony (Sb), barium (Ba), and mer-cuiy (Hg) stack emissions from stationaiy sources. This method may also be used for the determination of particulate emissions fohowing the procedures and precautions described. However, modifications to the sample recoveiy and analysis procedures described in the method for the purpose of determining particulate emissions may potentially impacl the front-half mercury determination. 

Mercury, determination by x-ray emission spectrography, 328 trace analysis by x-ray emission spectrography, 225-227... 

Equation (9.2) can be used to calculate the metal s surface potential. The value of the electron work function X can be determined experimentally. The chemical potential of the electrons in the metal can be calculated approximately from equations based on the models in modem theories of metals. The accuracy of such calculations is not very high. The surface potential of mercury determined in this way is roughly -F2.2V. 

Quevauviller Ph (1997b) Overview of SM T (BCR) activities for the quality control of mercury determination in the environment. Eresenius J Anal Chem 358 419-423. 

Quevauviller Ph, and Maier EA (1999) Interlaboratory studies and certified reference materials for environmental analysis - the BCR approach. Elsevier, Amsterdam Quevauviller Ph, Drabaek I, Muntau H, Biahchi M, Bortoli A, and Griepink B (1996a) Certified reference materials (CRMs 463 and 464) for the quafity control of total and methyl mercury determination in tuna fish. Trends Anal Chem 15 160-167. 

Samples for mercury analysis should preferably be taken in pre-cleaned flasks. If, as required for the other ecotoxic heavy metals, polyethylene flasks are commonly used for sampling, then an aliquot of the collected water sample for the mercury determination has to be transferred as soon as possible into glass bottles, because mercury losses with time are to be expected in polyethylene bottles. 

Fig. S.6 Gas sample introduction system for mercury determination by atomic fluorescence.

Of these, the fluorescence approach described by Thompson and Reynolds [17] and modified by Thompson and Godden [18] has proved to be the most sensitive. Godden and Stockwell [12] have described a specific fluorescence system tailored for mercury determination in more detail. P.S. Analytical has developed a fuUy automated system from these initial developments to measure mercury produced from the samples, to quantify the data and provide precise analytical reports, using an IBM compatible computer and custom software. 

Trace mercury determination by differential pulse (dp) anodic stripping voltammetry on polythiophene-quinoline/glassy carbon modified electrode has been reported [77]. 

Typical cold vapour generation AAS system used for mercury determination. The same system can be used with a flame in place of the Pyrex tube to allow the determination of hydride -forming elements. 

B. Izgi, C. Demir and S. Gucer, Application of factorial design for mercury determination by trapping and graphite furnace atomic absorption spectrometry, Spectrochim. Acta, Part B, 55(7), 2000, 971-977. 

R. Rodil, A. M. Carro, R. A. Lorenzo, M. Abuin and R. Cela, Methyl-mercury determination in biological samples by derivatisation, solid-phase microextraction and gas chromatography with microwave-induced plasma atomic emission spectrometry, J. Chromatogr. A, 963(1-2), 2002, 313-323. 

J. Moreda-Pineiro, P. Fopez-Mahia, S. Muniategui-Forenzo, E. Fernandez-Fernandez and D. Prada-Rodriguez, Direct mercury determination in aqueous slurries of environmental and biological samples by cold vapor generation-electrothermal atomic absorption spectrometry. Anal. Chim. Acta, 460(1), 2002, 111-122. 

E. Ramalhosa, S. Rio Segade, E. Pereira, C. Vale and A. Duarte, Simple methodology for methylmercury and inorganic mercury determinations by high-performance liquid chromatography-cold vapour atomic fluorescence spectrometry. Anal. Chim. Acta, 448(1-2), 2001, 135-143. 

Bureau of Mines Round-Robin for Mercury Determination in Coal. 

Analysis of the samples for elemental constituents was performed using instrumented neutron activation analysis (NAA) and spark source mass spectrometry (SSMS) (2). In addition, the many mercury determinations were made by flameless atomic absorption (AA). 

A cold quartz tube for containing mercury vapor (for mercury determination). 

T.G. Laperdina, Mercury Determination in Natural Waters, Nauka, Novosibirsk, 2000 (in Russian). 

BIOSENSOR CALIBRATION AND METHYL MERCURY DETERMINATION IN STANDARD SOLUTIONS... 

Anthemidis, A.N., G.A. Zachariadis, and J.A. Stratis. 2004. Development of a sequential injection system for trace mercury determination by cold vapour atomic absorption spectrometry. Talanta 64 1053-1057. 

Figure 1 Apparatus for cold vapour mercury determination by AAS...

The success achieved in cold vapour mercury determinations prompted a number of investigators to examine the scope for conversion of other elements to... 

G. Schnitzer, A. Soubelet, C. Testu, C. Chafey, Comparison of open and closed focussed microwave digestions in view of total mercury determination by cold vapor atomic absorption spectrometry, Mikrochim. Acta, 119 (1995), 199-209. 

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