Fluorometric Method for Determination of Mercury (II) with Rhodamine B

A fluorometric method for the determination of iron(II) with fluorescein isothiocyanate and iodine.

Determination of mercury (II) by spectrophotometric method based on self assembly of gold nanoparticles

Due to the binding of the –COO- group with the mercury (II), gold nanoparticlesfunctionalized with glutathione can self-assemble to form a supermolecular network in the HAc-NaAc buffer solution. The aggregation of functionalized gold nanoparticles and mercury (II)caused the shift of maximum absorption peak of the UV-Vis spectrum from 520 nm to 609 nm.Based on this principle, a simple spectropho...

A Facile Spectrophotometric Method for the Determination of Hypochlorite using Rhodamine B

Um método espectrofotométrico simples, rápido e sensível foi desenvolvido para a determinação de hipoclorito usando Rodamina B. O método proposto considera a reação de hipoclorito com iodeto de potássio em meio ácido, com liberação de iodo. O iodo liberado descora a solução vermelho-rosada de Rodamina B que pode ser medida em 553 nm. Este decréscimo na absorbância é diretamente proporcional à c...

A shortened method for the fluorometric determination of phenylalanine.

As a result of a study of the classic ninhydrin reaction with amino acids (which results in the productionof Ruhemann’spurple), and the fluorescencereaction occurring between ninhydrin and phenylalanine in the presence of a dipeptide, the initial incubation period in the fluorescence reaction was shortened from 2 hr. to 16 mm. This improvement in the fluorometric method for the determination of...

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...