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Biomedical subjects

A Sugimae

Publications and source records attributed to A Sugimae.

6 recordsLinked to original sources
PubMed1989

Normalization and calculation of lanthanide element concentrations in environmental samples.

A mathematical model for the prediction of lanthanide element concentrations in soil and plant samples is presented. A comparison between predicted and measured lanthanide values in soil and plant samples show, that the model produces good results for the elements in the soil samples and for most elements in plant material. The accuracy of prediction worsens with decreasing concentration of the heavier lanthanide elements. The mathematical model presented is not valid on other environmental samples like aerosols, because no data for these matrices are available yet to calibrate our normalized curves.

Mathematics↗
PubMed1984

Determination of trialkyltin, dialkyltin, and triphenyltin compounds in environmental water and sediments.

An analytical procedure for the determination of trialkyltin (tributyltin, tripropyltin), triphenyltin and dialkyltin (dibutyltin) compounds in environmental water and sediment was studied. Water samples were extracted into benzene with hydrochloric acid and sodium chloride. Sediment samples were extracted into methanolic hydrochloric acid and converted into benzene. Silica gel, which was impregnated with hydrochloric acid and activated, was used for clean-up of these compounds. These extracts of organotin chlorides were hydrogenated with an ethanol solution of sodium borohydride. Organotin hydrides were measured by gas chromatography with electron-capture detection. Recoveries of these compounds were ca. 70-95% from river water and sediment samples. The detection limits were 0.4-0.8 micrograms/l in water and 0.02-0.04 micrograms/g in sediment samples.

Chromatography, Gas↗