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L Ferraris

Publications and source records attributed to L Ferraris.

21 records · Page 2Linked to original sources
PubMedDate not supplied

Liquid chromatographic determination of triasulfuron in soil.

Two extraction methods were developed for the determination of triasulfuron in soil. Method I included extraction with methanol-phosphate buffer at pH 7 (2 + 1, v/v), liquid-liquid partition with dichloromethane, and cleanup on a liquid chromatographic Si adsorption solid-phase extraction tube. In Method II, Extrelut was added and the sample was then extracted with acetonitrile. In both cases, the extracts were analyzed by liquid chromatography (LC) with UV detection and the LC peak was confirmed by LC/mass spectrometry (MS). The 2 methods were tested on 3 soils having different physicochemical characteristics. Method I gave 83% average recovery and a determination limit of 0.4 microg/kg soil. Method II gave 67% average recovery and a determination limit of 2 microg/kg soil. Examples of application of Method I to field samples are reported.

Chromatography, Liquid↗
PubMedDate not supplied

[Bases of infusional therapy. Note. I. Fluid balance].

The complex hydroelectrolytic problem is examined by a study of the physiology and physiopathology of fluids, electrolytes and proteins. A number of interesting critical and clinical problems of use in the pre- and postoperative treatment of surgical patients and in cases where a change in the hydroelectric balance takes place, are involved. Therapy is facilitated if needs are calculated on the basis of the three basic principles: 1) daily physiological need; 2) replacement of physiological losses; 3) elimination of the existing deficiency.

Humans↗