Determination of Trace Metals in Oils by Sulfur Incineration and Spectrophotometric Measurements.

Automated Determination of Elements in Organic Samples Using X-Ray Emission Spectrometry.

“…Much of the 1 Present address, The Johns Hopkins University, School of Medicine, 725 N. Wolfe Street, Baltimore, Md. corroborative evidence for the suggested cleavage paths has been previously published in a detailed report describing the behavior of ethyl N-phenylcarbamate and ethyl V-ethylcarbamate upon electron bombardment (4). The volatility of carbamates, the small amount of sample required for an analysis, and the wealth of structural information contained in a spectrum make mass spectrometry an excellent analytical approach for carbamates as well as for compounds which can be easily converted into carbamates.…”

Measurement of organic carbon in water using the hydrogen-flame ionization detector

“…The sample is decomposed by ashing, with sulfur added to prevent loss of volatile metalloporphyrins. Agazzi et al (12) have shown there is no loss of metal with sulfur incineration at metal levels greater than 1 ppm. We have now demonstrated equally good metal recovery down to 0.1 ppm.…”

Facile Aldolization Catalyzed by Ionic Liquid [4-Sulfbmpyrazine][BF4]

“…Recently much attention has been paid to studies on acidic ionic liquid catalysts with stability and high catalytic activities. Ionic liquids are considered as the green solvents and catalysts in terms of low vapour pressure, high efficiency, easy separation of products and recyclability [2][3][4][5][6][7] . In this paper, we reported that the acidfunctionalized ionic liquid 1-(4-sulfonic group) butyl-3-methylpyrazine tetrafluoroborate (abbreviated as [4sulfbmpyrazine][BF4]) catalyzed the acetalization of aromatic aldehydes and diols to afford acetals.…”