Aqueous standards of Ag, Cu, Fe, Mg, Ni, Pb, and Sn were used for the measurement of these elements in jet engine and reciprocating engine oils by the graphite rod atomizer atomic absorption spectrometric method. The graphite rod atomizer method resulted ...

...million as determined by analytical method entitled �Atomic Absorption Spectrometric Determination of Sub-part-per-Million Quantities...as determined by an analytical method entitled �Atomic Absorption Spectrophotometric Determination of...

Hydrolysis of frozen concentrated orange juice with concentrated nitric acid has been evaluated as a sample preparation method prior to flame atomic absorption spectrometric measurement of certain elements in orange juice concentrate. The hydrolysis proce...

A novel atomic absorption spectrometric method and two highly sensitive spectrophotometric methods were developed for the determination of paracetamol. These techniques based on the oxidation of paracetamol by iron (III) (method I); oxidation of p-aminophenol after the hydrolysis of paracetamol ...

Atomic-absorption spectrometric methods are described for the determination of metals and silicon in a fly-ash which is produced during oil recovery from Alberta tar sands. The techniques of standard additions and matrix matching are compared. An experimental design for the detection, estimation and correction of interference effects ...

The paper briefly reviews the status of titanium as an environmental pollutant and presents a new method suitable for the microdetermination of the metals in plants, animal tissues and waters. The method is based on extractive separation of titanium as its chelate with N-p-methoxyphenyl-2-furylacrylohydroxamic acid (MFHA) in chloroform or isoamyl alcohol ...

Potentiometric and atomic absorption spectrometric (AAS) methods are described for the determination of various sulfonamides in tablets, suspensions, and injections, based on reactions with silver and copper ions. The methods involve direct titration at pH 8, using either a graphite electrode in which silver and ...

The World Health Organization (WHO) European and International Standards for Drinking Water, and the EC Directives concerning the quality of water intended for the abstraction of drinking water and the quality of water for human consumption, all recommend...

The research performed during the four year period is reviewed. The four major areas of research included an investigation of the fundamental, instrumental, and methodlogical (applications are included) studies in atomic emission, atomic absorption, and a...

Fifteen new hydroxamic acids were explored in conjunction with trioctylmethylammonium cation for the extractive separation of manganese into MIBK from the anions and cations commonly associated with the metal in environmental samples. The most rapid extraction with the maximum selectivity and sensitivity for the atomic absorption spectrometric ...

... continuing correlation programs are essential to the management and control of the laboratories engaged in the spectrometric oil analysis programs ...

... Title : Method for the Particle Size Independent Spectrometric Determination of Metal Particles in Lubricating Oils and Hydraulic Fluids. ...

... Title : A Method for the Particle Size Independent Spectrometric Determination of Metal Particles in Lubricating Oils and Hydraulic Fluids. ...

A new pulse shape correction method combined with a pulse shape selection method has been proposed for a CdTe detectors energy resolution improvement and increasing the total absorption peak efficiency. The capabilities of the new technique for the spectrometric characteristic improvement are based on using ...

The EPA protocols for SW-846 Methods 7470 and 7471 are cold-vapor atomic absorption spectrometric (CV-AAS) methods for the determination of mercury in aqueous and solid environmental samples. In continuation of a previous single-laboratory study in which a revised more sensitive ...

A simple, rapid and sensitive combined solvent extraction and atomic-absorption spectrometric method has been developed for the determination of tellurium in copper, lead, selenium and blister copper. Tellurium is extracted as the trioctylmethylammonium-tellurium(IV) bromide complex into butyl acetate and determined by flame ...

The AFOSR program on Gas Phase Spectrometry, Trace Analysis of Elements and Combustion Diagnostics at the University of Florida consists of fundamental, instrumental, methodological and applied studies of atomic and molecular emission and luminescence and atomic and molecular absorption spectrometric methods, particularly as these ...

A simple and reliable method based upon impregnation of Cyanex302 on octadecyl bonded silica membrane disk has been developed for separation and atomic absorption spectrometric determination of nickel. The influence of various parameters like aqueous phase pH, flow rate and volume of eluent were investigated systematically to optimize ...

An atomic absorption (AA) spectrometric method is described for the determination of the total lead content of gasoline regardless of the lead alkyl type. The gasoline sample is diluted with methyl isobutyl ketone, and the alkyl lead compounds are stabilized by reaction with iodine and a quaternary ammonium salt. The lead is determined ...

This report describes a method which has been employed using phenolate ion absorption at 291 nm for the measurement of phenols in water. The monohydric phenols measured are among those abundant in coal gasification by-products. The errors obtained in employing an average proportionality constant for the calculation of concentrations of individual phenols ...

This article reviews numerous analytical techniques for determining trace amounts of selenium in body fluids. In addition, sampling storage and treatment procedures are evaluated. The analytical techniques reviewed include the following: spectrofluorometry and spectrophotometry; atomic absorption spectrometry; fluorescence and atomic emission spectroscopy; mass spectroscopy; ...

... Interlaboratory Trial: Graphite Furnace Atomic Absorption Spectrometric Determination of Lead and cadmium Extracted from Ceramic Foodware ...

A dry ashing, flameless atomic absorption spectrometric method was evaluated to determine arsenic and selenium in foods. Samples were dry-ashed with Mg(NO3)2-MgO and dissolved in HCl. Selenate was reduced to selenite by boiling in 4N HCl. Selenate was reduced to selenite by boiling in 4N HCl, and arsenate to arsenite by treatment with ...

A method for the determination of arsenic in whole human blood is presented. To decrease the matrix effects from this complex sample, the blood was prediluted with a matrix modifier solution. The modifier solution contained a surfactant, Triton X-100, which homogenized the sample and allowed accurate pipetting by an autosampler. The modifier also contained nickel nitrate which ...

An x-ray absorption spectrometric technique is described. A preliminary experiment to observe emission lines from a wide range of targets was attempted. (DLC)

An x-ray absorption spectrometric technique is described. A preliminary experiment to observe emission lines from a wide range of targets was attempted. (ERA citation 11:016775)

... AE) 6 b. Atomic Absorption Spectrophotometry (AA) 7 ... of both spectrometers. b. Atomic Absorption Spectrophotometry (AA) Trace ...

Two sensitive spectrophotometric and atomic absorption spectrometric procedures are developed for the determination of certain cephalosporins (cefotaxime sodium and cefuroxime sodium). The spectrophotometric methods are based on the charge-transfer complex formation between these drugs as n-donors and 7,7,8,8-tetracyanoquinodimethane ...

The relationships between differential and integral cross sections are considered together with their application to the calculation of reaction rates in reactor spectra. A brief review of the measurement of these quantities is given in order to show the importance of chemical analysis in all methods. Particular attention is devoted to the determination of integral ...

In the present study IR spectrometric analysis was used to determine clear research octane number, heat of formation, specific gravity and mole fraction of methyl group, simultaneously in hydrocarbon mixtures. IR absorption spectrum can be used to provide information, that can be obtained by several existing test methods.

High-temperature vaporization of vanadium pentaoxide (V/sub 2/O/sub 5/) samples from vitreous carbon and tantalum furnaces that are heated resistively in ultrahigh vacuum is investigated with the simultaneous atomic absorption/mass spectrometric technique. The advantage of this method is that it allows the observation of intermediates ...

Spectrometric studies on the complexation of zirconium IV (Zr(IV)) with five new pyrazolonic derivatives were carried out. The influence of ortho-substituted groups on the operational parameters of the spectrometric method of determining Zr(IV) was investigated. The absorption spectra revealed that the wavelengths ...

An electrothermal atomic absorption spectrometric method to quantify the iridium content of HT-29 colon carcinoma cells exposed to iridium metallodrugs was developed. Optimisation of the procedure involved the evaluation of pyrolysis and atomisation conditions (optimal values were 1400 degrees C for pyrolysis and 2400 degrees C for ...

This review presents a critical discussion of selected reports dealing with the pretreatment methods of oily samples and the determination of their organic and inorganic constituents using flow systems and spectrometric methods. Special emphasis is given to the on-line couplings with detection systems based on UV-visible ...

Collinear dual beam thermal lens spectrometric (TLS) detection, combined with flow injection analysis (FIA), was developed and applied to determine simultaneously concentrations of ionic and colloidal silver in the Russian drinking water supplies of the International Space Station (ISS). The newly developed method is based on on-line generation of silver ...

Rapid mass spectrometric immunoassay methods for detecting and/or quantifying antibody and antigen analytes utilizing affinity capture to isolate the analytes and internal reference species (for quantification) followed by mass spectrometric analysis of t...

A draft standard method is presented for the determination of Ca, Cu, Fe, Mg, Mn, K, Na, and Zn in animal feeding stuffs. The method specifies dry ashing of samples and detection by atomic absorption spectrometry (AAS). The applicability of the method for various concentrations of the elements was tested in a ...

A simple and sensitive combined solvent-extraction and atomic-absorption spectrometric method has been developed for the determination of gold in silver, copper, lead, selenium and anode slime. Samples are decomposed with hydrochloric and nitric acids, and gold is extracted as the trioctylmethylammonium-gold bromide complex and ...