selenium tellurium determination

A New Spectrophotometric Method for Determination of ...

A simple, rapid, and sensitive spectrophotometric method for the determination of trace amounts of selenium (IV) was described. In this method, all selenium spices reduced to selenium (IV) using 6 M HCl. Cloud point extraction was applied as a preconcentration method for spectrophotometric determination of selenium (IV) in aqueous solution.

Semimicro determination of selenium and tellurium by ...

Finely divided selenium and tellurium undergo oxidation to selenic and orthotelluric acids by a concentrated solution of chloramine-T in acid medium. An analytical procedure (accurate to <1 %) has been developed based on this reaction.

A study of electrometric methods for determining selenium ...

was standardized against specially purified tellurium dioxide. Part 1 of the table shows that tellurium dioxide is quantitatively oxi­ dized to, the telluric state by potassium dichromate, and that selenium dioxide has no effect upon the determination. Selenium. dioxide in quan­

Determination of arsenic, cadmium, selenium, and tellurium ...

Nov 26, 2014· Determination of arsenic, cadmium, selenium, and tellurium in technogenic raw materials after sorption concentration on hydroxides using …

Tellurium Assay Determination

To insure accuracy, duplicate samples should be run and the results averaged, particularly on samples of low tellurium content. The limit of determination is 0.001 percent tellurium, which is equivalent to 0.1 milligram of tellurium when using a 10-gram sample.

Determination of selenium and tellurium concentrations in ...

Determination of selenium and tellurium concentrations in Pyrenean peridotites (Ariege, France): New insight into S/Se/Te systematics of the upper in mantle samples. Chemical Geology, 2010. Olivier Alard. Download with Google Download with Facebook or download with email.

Determination of bismuth, selenium and tellurium in nickel ...

May 17, 2002· Read "Determination of bismuth, selenium and tellurium in nickel-based alloys and pure copper by flow-injection hydride generation atomic absorption spectrometry—with ascorbic acid prereduction and cupferron chelation–extraction, Analytica Chimica Acta" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your …

Arsenic, Antimony, Selenium and Tellurium Determinations ...

As part of the Bureau of Mines program for advancing minerals technology, a high-current-density copper-electrowinning procedure is being tested. This paper describes a method developed in support of this research for the determination of arsenic, antimony, selenium, and tellurium in high-purity ...

A method for the determination of selenium, tellurium and ...

A method for the determination of selenium, tellurium and arsenic in commercial copper B. S. Evans, Analyst, 1942, 67, 346 DOI: 10.1039/AN9426700346 If you are not the author of ...

Differential Potentiometric Determination of Selenium and ...

Determination of Water and Alkali Metal Oxide in Alkali Metal Salts of Selenium and Tellurium by Karl Fischer Titration.. Analytical Chemistry 1963, 35 (11), 1693-1695.

SELENIUM - psanalytical.com

Visit our all about selenium page for general information on selenium, its properties, and how it impacts on the environment. Selenium in Water and Soils and other media. The Millennium Excalibur is used routinely by laboratories worldwide for the determination of total selenium in various solid, liquid and gaseous sample types.

PHOTOMETRIC AND EXTRACTION-PHOTOMETRIC METHODS FOR …

osti.gov journal article: photometric and extraction-photometric methods for the determination of selenium and tellurium (a review).

Xylenol Orange as A New Reagent for the Colorimetric ...

PDF | Xylenol orange is proposed as new sensitive reagent for the colorimetric determination of selenium and tellurium. The reagent forms a pink colored radical cation with selenite and tellurite ...

The Determination of Selenium. - digitalcommons.lsu.edu

Selenium was identified as an element in 1817 by the Swedish chemist, Berzelius, in a residue from the production of sulfuric acid. It was named from the Greek word, selene, meaning the moon, because of its resemblance to tellurium, which had been discovered earlier and was named from the Latin word, tellus, meaning the earth.

Simultaneous spectrophotometric determination of ...

A similar procedure is reported for the simultaneous determination of molybdenum and tellurium except that in the determination of molybdenum, the phenylfluorone complex is extracted by chloroform in the absence of perchlorate ions.

DETERMINATION OF TELLURIUM

DETERMINATION OF TELLURIUM by W. L. Anderson 1 and H. E. Peterson 1 ABSTRACT Standard tellurium analytical pro~edures were modified to 0btain the greater sensitivity needed to support a survey of tellurium resources by the

(PDF) Determination of Selenium and Tellurium in Basalt ...

PDF | Promising methods have been developed recently for the determination of selenium (Se) and tellurium (Te) in geological materials at ng g(-1) and lower levels, using hydride generation ...

The Determination of Selenium in Steels - Agilent

approximately equal amounts of tellurium. This method for the determination of selenium in steels is readily adaptable to the determination of tellurium in steels, using the 2142.8 Å tellurium resonance line. References 1 W. Slavin, Atomic Absorption Spectroscopy, Interscience Publ. 1968, 156–7 2 C. L. Chakrabarti, Analytica Chimica Acta ...

Determination of selenium and tellurium in silver chloride ...

The selenium and tellurium are assumed to occur as minute inclusions of selenide and telluride. Many elements interfere in the methods that have been proposed for the determination of selenium and tellurium, so that a fairly complete separation of the two elements from the impurities and from each other is necessary.

Atomic Absorption Determination of Lead, Bismuth, Selenium ...

The determination of lead, bismuth, selenium, tellurium, thallium, and tin was successfully demonstrated by direct atomization from complex, nickel-base alloy chips with commercial atomic absorption furnace equipment. The determination was carried out …

DETERMINATION OF SELENIUM AND TELLURIUM ... - shsu.edu

Spectrophotometric determination of selenium and tellurium oxyanions in bacterial growth media using NaBH 4 as the reducing agent provided a good linear range for selenate, selenite, and tellurite. The linear range for tellurate analysis using the borohydride method was quite small but this may have been caused by the poor solubility ...

Studies in hydride generation atomic fluorescence ...

Aug 01, 2000· The effects of tetrahydroborate (0.02–1%) and iodide (0–3 M) were investigated in determination of tellurium and selenium by hydride generation atomic fluorescence spectrometry. The effect of tetrahydroborate and iodide concentration were tested on the shape of calibration curves in concentration range of 1–1000 ng ml −1 analyte.

The Determination Of Arsenic Antimony, Selenium and ...

----- ABSTRACT A method has been developed for the direct determination of arsenic, antimony, selenium, and tellurium in surface waters and industrial effluents using the graphite furnace. Optimization of instrumental variables is discussed.

Determination of Selenium and Tellurium in Basalt Rock ...

Simultaneous determination, by hydride generation and inductively coupled plasma atomic emission spectrometry, Lindstrom R.M. (2001) of arsenic, antimony, selenium, and tellurium in silicate Limits for qualitative detection and quantitative rocks containing the noble metals and in sulphide ores.

Spectrophotometric determination of selenium and tellurium ...

116 SHORT COMMUNICATIONS Spectrophotometric determination of selenium and tellurium with thioglycollic acid Thioglycollic acid (TGA) forms soluble complexes with many metal ions, and has been used for the Spectrophotometric determination of iron1'2, molybdenum3'4, uranium(VI)1' and nickel".

Selenium and Tellurium | The School of Natural and ...

Selenium is not only essential for animals but it is important technologically important. A project focuses on the biogeochemistry of selenium and tellurium using bioimaging and speciation analysis. The TeaSe project (Tellurium and Selenium cycling and supply) is funded by NERC and involves interdisciplinary teams from several Universities in ...

Developing a Method for Determining the Mass Balance of ...

tellurium that was bioreduced when a selenium-resistant facultative anaerobe was amended with either selenium or tellurium; and (2) methods to analyze for these metalloids in biological samples. Methods Analytical methods were developed for the determination of selenium and tellurium in biological samples by hydride generation-atomic absorption.

Tellurium - P S Analytical

P S Analytical are experts in the determination and speciation of selenium, arsenic, mercury, antimony, tellurium and bismuth. We supply dedicated analysis systems for total tellurium measurements, as well as providing contract analytical services to clients worldwide.

The development of methods for the determination of ...

validation was by comparing the results obtained for the determination of selenium in nutritional supplements with those from ICP-MS. Selenium speciation in the nutritional supplements was studied using a developed method in which the selenium species selenomethionine, Se (IV), and Se (VI) were

Polarographic determination of selenium and tellurium in ...

OSTI.GOV Technical Report: Determination of antimony, arsenic, beryllium, cadmium, lead, selenium, silver and tellurium in environmental water samples by flameless atomic absorption. Final report

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