摘要:

First, the fluorescence-reactions between glucuronic acid (D-glucuronolactone) as an uronic acid andN-benzyl-2-naphthylamine(NBNA) orN-benzyl-1-naphthylamine(NB-1-NA) as a secondary naphthylamine were systematically investigated in acetic acid medium. Secondly, NBNA-glucuronic acid fluorescence-product that has a maximum emission wavelength(Em) at 508 nm with excitation wavelength(Ex) at 468 nm was used for a selective assay of glucuronic acid; the calibration curve was linear in the range from 5 ng/ml to 2.0 μg/ml glucuronic acid, and the recovery test in normal urine was satisfactory (98.4–102.5%).

ISSN:0003-2719    

DOI:10.1080/00032719308019896

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Several cyclodextrin/NaCl and trehalose/NaCl mixtures were investigated as solid matrices for obtaining room-temperature luminescence from a benzo(a)pyrene (B(a)P) guanosine adduct. Room-temperature fluorescence (RTF) and room-temperature phosphorescence (RTP) intensities from the B(a)P-guanosine adduct were compared for different solid matrices. These results showed that 25% trehalose/NaCl, 1% α-cyclodextrin/NaCl, and 1% γ-cyclodextrin/NaCl solid matrices yielded strong fluorescence signals and moderately strong phosphorescence signals at room temperature from the B(a)P-guanosine adduct. In addition, the luminescence properties of pyrene, guanosine, guanosine 3′ -monophosphate free acid and guanosine 3′-monophosphate sodium salt on 1% α-, β-, and γ- cyclodextrin/NaCl solid matrices were obtained.

ISSN:0003-2719    

DOI:10.1080/00032719308019897

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A method for the microdetermination of tin at the μg 1−1level has been developed, based on Solid-Phase Spectrophotometry (SPS). Tin reacts with Pyrocatechol Violet at pH 3 to form a 2:1 (PCV:Sn) complex which is fixed on a dextran type anion-exchange gel. The gel phase absorbance is measured directly, and allows for the determination of tin in the range of 0.8–15.0 μg 1−1, with an RSD of 4.3 %. The method has been applied to the determination of Sn(IV) in natural and sea waters and pineapple juice.

ISSN:0003-2719    

DOI:10.1080/00032719308019898

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The use of a cellulose ion-exchanger (Hyphan) for the isolation of MnO4−, CrO42-and MoO42-from aqueous solution after reduction with different reducing agents is described. After preconcentration, Mn(II), Cr(III) and molybdenum cations were determined by atomic absorption spectrometry. Furthermore, the distribution coefficients Kdof the investigated cations as a function of pH were studied, and are in the range 104.3−105.9cm3g−1for the above cations.

ISSN:0003-2719    

DOI:10.1080/00032719308019899

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A model to calculate the analytical sensitivity, limit of detection, limit of determination and precision of a method of instrumental analysis through a data set obtained by calibration experiment using the statistical analysis of linear regression, is proposed. This model has been applied to spectrophotometric, spectrofluorimetric and chromatographic methods. The values obtained are independent of the instrument used and can be applied as a criterion of comparison between different methods proposed for the same analyte. Also, these characteristics have been calculated using the IUPAC suggested model and both results have been compared.

ISSN:0003-2719    

DOI:10.1080/00032719308019900

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0003-2719    

DOI:10.1080/00032719308019885

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor