Spectrofluorometric determination of common epoxides with sodium sulfide and o-phthalaldehyde and taurine reagents

1985 ◽  
Vol 57 (8) ◽  
pp. 1687-1690 ◽  
Author(s):  
Akira. Sano ◽  
Shoji. Takitani
Keyword(s):  
Sodium Sulfide ◽  
Spectrofluorometric Determination

Spectrophotometric and Spectrofluorometric Determination of Heptaminol and mexiletine in Their Dosage Forms

1997 ◽  
Vol 30 (11) ◽  
pp. 2029-2043 ◽  
Author(s):  
Abdel Fattah M. El Walily ◽  
Fawzy A. El-Yazbi ◽  
Saeid F. Belal ◽  
Omayma Abdel-Razak
Keyword(s):  
Dosage Forms ◽  
Spectrofluorometric Determination

Use of 1-Hydroxy-2-Carboxyanthraquinone for the Spectrofluorometric Determination of Be(II)

1975 ◽  
Vol 8 (10) ◽  
pp. 753-761 ◽  
Author(s):  
F. Capitan ◽  
F. Salinas ◽  
L. M. Franquelo
Keyword(s):  
Spectrofluorometric Determination

A new selective reagent for the spectrofluorometric determination of beryllium

1976 ◽  
Vol 21 (4) ◽  
pp. 402-410 ◽  
Author(s):  
V. Drevenkar ◽  
Z. Štefanac ◽  
A. Brbot
Keyword(s):  
Spectrofluorometric Determination ◽  
Selective Reagent

scholarly journals Spectrofluorometric determination of L-tryptophan in canary (Canarium indicum L.) seed protein hydrolysate

2019 ◽  
Vol 10 (1) ◽  
pp. 4780-4785
Keyword(s):  
Protein Hydrolysate ◽  
Intermediate Precision ◽  
North Sulawesi ◽  
Accuracy Test ◽  
Spectrofluorometric Determination ◽  
Relative Standard ◽  
Indigenous Plant ◽  
Assay Precision ◽  
Specific Reagent

Canary (Canarium indicum L.) is an indigenous plant of Indonesia, which mainly grows in the eastern part of Indonesia, especially in the Maluku, North Sulawesi, and Seram islands. We believe that no scientific reports have been conducted about L-tryptophan content in Canarium indicum. Therefore, this study was conducted to determine the presence and quantitate the aromatic amino acid (L-tryptophan) in the canary protein hydrolysate by the spectrofluorometric method. The protein hydrolysate was prepared by two hydrolysis methods, enzymatic and alkaline hydrolysis. L-tryptophan can be differentiated from tyrosine directly without using any reagent by excitation of the sample at 295 nm in order to avoid tyrosine emission. The equation of calibration curve correlation using standard in the range 0.5-5 ppm was y = 6632.3x - 845.42 and correlation coefficient of 0.9997, while the coefficient of variance in linear regression was 1.29%. The detection limit and quantification limit obtained were 0.116 ppm and 0.35 ppm respectively. The recoveries of the accuracy test were obtained in the range of 95-96%. The relative standard deviation of intra-assay precision tests were obtained in the range of 0.5-1.8%, while the intermediate precision in the range of 2.18-3.74%. L-tryptophan was detected in all samples (papain, pepsin, and alkaline hydrolysate), with concentrations 5.6, 5 and 1.53 mg/100mg of protein respectively. The used fluorometric method complied with the validation requirements and can be used to analyze L-tryptophan in samples containing tyrosine without overlapping of spectra and without the use of any specific reagent.

scholarly journals Simultaneous Spectrofluorometric Determination of Piroxicam and Pyridoxine Using Generalized Rank Annihilation Method

2006 ◽  
Vol 22 (2) ◽  
pp. 263-267 ◽  
Author(s):  
Hamid ABDOLLAHI ◽  
Mohammad Hossein SORORADDIN ◽  
Abdolhossein NASERI
Keyword(s):  
Spectrofluorometric Determination

Spectrofluorometric Determination of BAY Vp 2674 Residues in Poultry Tissues

1987 ◽  
Vol 70 (5) ◽  
pp. 813-818 ◽  
Author(s):  
T Bill Waggoner ◽  
Malcolm C Bowman
Keyword(s):  
Detection Limit ◽  
Fluorescence Detection ◽  
Coefficient Of Variation ◽  
Organic Extract ◽  
Spectrofluorometric Determination ◽  
Poultry Tissues ◽  
Liquid Chromatographic

Abstract A spectrofluorometric (SPF) method is described for determination of residues of BAY Vp 2674 in chicken and turkey tissues. The drug is extracted from tissues with dichloromethane-methanol. The organic extract is concentrated to near dryness and cleaned up by a series of partitionings with n-hexane, then dichloromethane against pH 2 buffer and dichloromethane against pH 12 buffer. The drug is partitioned into dichloromethane from pH 7 buffer and concentrated to dryness. The residue is dissolved in pH 3.5 buffer for SPF analysis at 282 nm (excitation) and 445 nm (emission). Recoveries of BAY Vp 2674 added to chicken and turkey tissues at levels of 0.05, 0.1, and 0.2 ppm range from 86 to 92% with a coefficient of variation of 3.4-10.1%. Detection limit is 0.02 ppm. A liquid chromatographic confirmatory procedure is also described, with ultraviolet and fluorescence detection

Spectrofluorometric Determination of Putrescine: Optimization of the Putrescine–Orthophthaldehyde Complex Using Spectrofluorometry

2016 ◽  
Vol 99 (6) ◽  
pp. 1642-1644
Author(s):  
Oladele Oyelakin ◽  
Moumouny Traoré ◽  
El Hadji Babacar Mbye ◽  
Abdourahmane Khonté ◽  
Lamine Cisse ◽  
...  
Keyword(s):  
Alkaline Medium ◽  
Fluorescence Intensity ◽  
Spectrofluorometric Determination

Abstract In alkaline medium, the complex formed between putrescine and orthophthalaldehyde was studied using spectrofluorescence. The derivative is kinetically stable 24 h after complexation. The stoichiometry of the complex is 1:1 at maximum fluorescence intensity, also 24 h after complexation.

Spectrofluorometric Determination of Thiamin and Riboflavin in Vegetable Foods

1993 ◽  
Vol 26 (9) ◽  
pp. 1977-1996 ◽  
Author(s):  
F. P García ◽  
C. Díaz ◽  
A. Hardisson
Keyword(s):  
Spectrofluorometric Determination ◽  
Vegetable Foods
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