tantalum treated graphite atomizer tubes for atomic

Modification of a Commercial Carbon Rod Flameless

Commercial nonflame atomizers have become available and depend upon electrothermal heating of a graphite rod, 1 a graphite tube, 2,3 or a tantalum ribbon 4 to atomize the sample. Detection limits in the microgram per liter range can be expected with these devices.

(PDF) Slurry sampling of sediments and coals for the

electrothermal atomizer with transversely heated Later on, Sturgeon et al. [15] studied the possibility of graphite tubes. An HS 5 chemical vapor generation retaining volatile hydrides on graphite tube surfaces system (Analytik Jena), operated in batch mode, was treated with a permanent modifier from the platinum coupled to the electrothermal atomizer via an MPE 5 group (Pd, Pt, Ru, Rh).

HJ 602

It is easy to form hard-dissolving tantalum carbide in ordinary graphite tubes, causing memory effect and making the measurement sensitivity low. build It is recommended to use high-quality pyrolytic coated graphite tubes or metal coated graphite tubes such as tungsten and tantalum, and the graphite tubes should be air-fired after each sample is analyzed. gold

Evaluation of Sample Treatment for the Simultaneous Flow

pre-treated sample solution was then processed in the flow sys-tem for in situ trapping and atomization in a graphite tube coated with iridium. The Ir per-manent modifier remained stable up to 300 firings and new coat-ings were possible without signif- As, Bi, Sb

Determination of Total Selenium Content in Cereals and

In the THGA atomizer, end-capped graphite tubes or atomic fluorescence (AF) [12] detection. fitted with integrated L'vov-platforms (Perkin-Elmer, Part No. Graphite atomizers are superior to quartz tube atomizers in that they can be utilized as ''in-situ'' or ''in-atomizer'' collection

Effect of high salt concentrations on the determination of arsenic and selenium by flow injection hydride generation electrothermal atomic

the interior surface of the graphite tube atomizer of an electrothermal atomic absorption spectrometer, which has been pre-treated with a trapping agent (e.g., iridium chloride solution) prior to atomization. A possible area of application of this methodology is in the

Determination of Trace Amounts of Palladium in Water

Pyrolytic graphite-coated graphite tubes were purchased from Shimadzu. The sample injection volume was 20 μL in all experiments. The instrumental parameters and temperature program for the graphite atomizer are listed in Table 1. Argon 99.999% purity (Air

DETERMINATION OF BORON IN WATER SAMPLES BY ELECTROTHERMAL ATOMIC

pyrolytically coated graphite tubes modified with refractory carbide forming elements (Ta, W, Zr, Pd, Ru, Os) were utilized to develop a reliable and sensitive method. Based on optimization studies, Tantalum (Ta) coated tube and co-injection of 5.0 L 0.01 3)

Cathode Lamps for Varian Atomic Absorption Spectrometers

CPI International presents an extensive collection of premium quality hollow cathode lamps for all atomic absorption spectrometers of the leading brand, Varian. Our models include 1.5 inch coded, 1.5 inch multi-element, 1.5 inch non-coded, and 1.5 inch super lamps.

Determination of selenium in water and industrial effluents

2002/5/1Tantalum treated graphite atomizer tubes for atomic absorption spectrometry. Analytical Chemistry 1978, 50 (3), 538-541. DOI: 10.1021/ac50025a044. J. E. Riley. Contamination-free adjustment of pH during trace analysis.,

Simultaneous and Direct Determination of As, Bi, Pb, Sb,

The use of pretreat platform of graphite tubes with W or W–Ru allowed enlarging the lifetime of atomizer in 750 heating cycles. Introduction The determination of trace heavy metals and nutrient elements in environmental, biological, and food samples is relevant for toxicology and healthy (Soylak et al. 2004, 2005 ).

Simultaneous and Direct Determination of As, Bi, Pb, Sb,

The use of pretreat platform of graphite tubes with W or W–Ru allowed enlarging the lifetime of atomizer in 750 heating cycles. Introduction The determination of trace heavy metals and nutrient elements in environmental, biological, and food samples is relevant for toxicology and healthy (Soylak et al. 2004, 2005 ).

Hydride generation atomic absorption spectrometry

F. Laborda, J. Medrano, J.I. Cortes, J.M. Mir, J.R. Castillo: "Comparison of palladium and zirconium treated graphite tubes for in-atomizer trapping of hydrogen selenide in hydride generation electrothermal atomization atomic absorption spectrometry",

Feasibility of in situ trapping of selenium hydride in a DBD

First published on 16th November 2018 Preconcentration of selenium hydride in a planar dielectric barrier discharge (DBD) atomizer was optimized with detection by atomic absorption spectrometry. Addition of 3.5 mL min −1 O 2 to the Ar plasma discharge resulted in the retention of selenium hydride in the optical arm of the DBD atomizer. . Analyte release and subsequent atomization were

(PDF) Feasibility of eliminating interferences in graphite

Spectrochimica Acta Part B 57 (2002) 473–484 Feasibility of eliminating interferences in graphite furnace atomic absorption spectrometry using analyte transfer to the permanently modified graphite tube surface Sandra M. Maiaa, Bernhard

Comparison of palladium and zirconium treated graphite

Zirconium treated graphite tubes were investigated and compared with non-treated and palladium coated ones for in situ trapping of selenium hydride generated in a flow injection system. Selenium was effectively trapped on zirconium treated tubes at trapping temperatures of 300-600C, similar to those observed for palladium, whereas trapping temperatures higher than 600C had to be used with

Graphite Tubes for Varian Medical Systems AA

Through critical screening, we ensure that our graphite tubes are completely free from trace metal contamination. For inquiries and assistance, you can reach us at 1 800-878-7654 (Customer Service Line), 707-525-5788 (California), +31 20 638 05 97 (Europe) or email SalesCPIInternational

HJ 602

It is easy to form hard-dissolving tantalum carbide in ordinary graphite tubes, causing memory effect and making the measurement sensitivity low. build It is recommended to use high-quality pyrolytic coated graphite tubes or metal coated graphite tubes such as tungsten and tantalum, and the graphite tubes should be air-fired after each sample is analyzed. gold

FLAME PHOTOMETRY OF PHOSPHORUS AND SULFUR BY GRAPHITE ATOMIZER

giving me a titanium carbide-treated tube. I am also grateful to the University of Georgia for supplying me with the graphite atomizer. I also extend my thanks to Perkin-Elmer Corporation for donating two pyrolytic-graphite tubes. Thanks is

Determination of Trace Amounts of Palladium in Water

Pyrolytic graphite-coated graphite tubes were purchased from Shimadzu. The sample injection volume was 20 μL in all experiments. The instrumental parameters and temperature program for the graphite atomizer are listed in Table 1. Argon 99.999% purity (Air

TERMS RELATED TO ELECTROTHERMAL ATOMIZATION

graphite and can enhance the atomization efficiency and tube lifetime and reduce the reactivity of the carbon surface, etc. An atomizer can be specified by indicating the material and form, e.g. glassv carbon tube, tantalum carbide-coated tube, tunvsten striD, etc.

Determination of Trace Amounts of Palladium in Water

Pyrolytic graphite-coated graphite tubes were purchased from Shimadzu. The sample injection volume was 20 μL in all experiments. The instrumental parameters and temperature program for the graphite atomizer are listed in Table 1. Argon 99.999% purity (Air

Flameless atomic

A flameless atomic-absorption method for determination of phosphorus is developed, employing zirconium treated graphite tubes. The great improvement of the sensitivity with these tubes eliminates the necessity of adding La(NO3)3. The sensitivity does not vary from tube to tube and its maximal value is attained within the first 2–3 firings. The atomization signal is practically the same

A Comparative Study of Gas Chromatography with Atomic Absorption and Atomic

graphite furnace (GF) used as an atomization device.l5-17 Analytical applications of this techniques to tin, how-ever, are relatively rare unless hydride-generation sample processing is used.3 Irrespective of the atomizer used, AAS shows a low

Laboratory Graphite Tubes

CPI International manufactures superior quality graphite tubes for atomic absorption spectroscopy applications. The graphite tubes are produced from one of the highest grades of spectrally pure graphite available today. Prior to use, the base material is tested for

Free Analyte Atom Distribution, Reactions and Analyte Reatomization in Quartz Tube Hydride Atomizers for Atomic Absorption Spectrometry

On-line atomization of selenium hydride in graphite furnaces: estimate of atomic absorption coefficient and spectroscopic temperature. J. D dina, T. Matoušek and W. Frech Spectrochim. Acta Part B, 51 (1996) 1107-1119

OSA

In order that carbide coatings could be prepared, graphite cuvettes were (1) placed in liquid TiCl4, MoCl5, or WCl6 under reduced pressure to fill the void space in the graphite with metal chloride; (2) allowed to soak for 24 h in water to hydrolyze the metal chloride; (3) heated for 1200 s at 120C and 10 s at 500C in an electrothermal atomizer to dry the metal hydroxide and form the oxide

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