Analysis of flavor and fragrance compounds using supercritical fluid extraction coupled with gas chromatography.

Determination of metals in biofluids and tissues: sample preparation methods for atomic spectroscopic techniques

Determination of chlorine in water by luminol chemiluminescence

Automated multiple flow injection analysis for flame atomic absorption spectrometry

The fluorescence and photoacoustic characteristics of a windowless flow cell intended for liquid chromatographic applications are compared with respective characteristics of a static cuvette cell. In addition, a photoionization mode of operation for the flow cell is exhibited which utilizes the ionization products of two-photon excitation of polynuclear aromatic hydrocarbons in n-alkanes to effect a sensitive detection of those PAHs.

Comparison of laser excited fluorescence and photoacoustic limits of detection for static and flow cells

High solids sample introduction for flame atomic absorption analysis

Microsampling Nebulizer Technique for Premixed Flame Atomic Spectrometry

Studies are presented describing an improved application of the NaBH4 reduction of soluble arsenite to form arsine as a preconcentration approach for ultra-trace level arsenic determination by inductively coupled plasma optical emission spectrometry. Specialized analyte introduction techniques are described for elimination of reaction by-products that would normally extinguish a medium power plasma discharge. An approach is presented to minimize the need for background correction and facilitate a superior arsenic detection limit (≤0.03 ng/ml) in a relatively inexpensive 1.2 kW inductively coupled plasma system.

Hydride Preconcentration for Inductively Coupled Plasma Optical Emission Spectrometry

: The question of molecular spectral interferences by undissociated inorganic matrix salts is inevitably raised when the direct atomic absorption analysis of digested or untreated complex materials is considered. Data presented in these studies indicate that the problem is not nearly as serious for premixed flame systems as has been reported for electro-thermal and total consumption burner atomization. (Author)

R. C. Fry

Papers

High solids sample introduction for flame atomic absorption analysis

Microsampling Nebulizer Technique for Premixed Flame Atomic Spectrometry

Hydride Preconcentration for Inductively Coupled Plasma Optical Emission Spectrometry

Molecular absorption spectra of complex matrices in premixed flames