Plasma L-[18F]6-Fluorodopa Input Function: A Simplified Method

A simplified fluorometric method for determination of plasma methotrexate.

A FLUOROMETRIC METHOD for the determination of pteroylglutamic acid (PGA) in nonbiologic material was reported by Alifrey et al (1). Freeman (2) adapted this method for the determination of amethopterm in plasma. Both procedures oxidized PGA or amethopterin with permanganate to yield a strongly fluorescent substance, 2-amino-4hydroxypteridine-6-carboxylic acid (3). The fluorescence due to the l...

A rapid simplified method for plasma 25-hydroxyvitamin D estimation.

A simplified radioimmunoassay of plasma aldosterone.

The analytical evaluation is described of a [125I]-aldosterone radioimmunoassay method for measuring aldosterone in human plasma, which requires no chromatographic purification before quantification by radioimmunoassay but does require organic solvent extraction. Rabbit anti-aldosterone serum is used, generated against aldosterone-3-oxime coupled to thyroglobulin. The antibody demonstrates negl...

Determination of L- Ascorbic Acid in Plasma by Voltammetric Method

Voltammetric techniques have been considered as important methods among the analytical techniques used for the identification and determination of trace concentrations of many biological molecules such as L-ascorbic acid (AA). L-ascorbic acid is an electro-active molecule, though it is difficult to determine its value directly with a majority of electrodes made of carbon and transition metals, ...

Determination of L- Ascorbic Acid in Plasma by Voltammetric Method

Voltammetric techniques have been considered as important methods among the analytical techniques used for the identification and determination of trace concentrations of many biological molecules such as L-ascorbic acid (AA). L-ascorbic acid is an electro-active molecule, though it is difficult to determine its value directly with a majority of electrodes made of carbon and transition metals, ...