ISSN:
1436-5073
Keywords:
room temperature phosphorescence
;
thiabendazole determination
;
waters analysis
;
foods analysis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract A new method for the determination of thiabendazole (TBZ) is proposed, based on enhanced native phosphorescence at room temperature when the pesticide is fixed on paper and using Pb (CH3-COO)2 as the enhancer. The sample and enhancer solutions were deposited on a slip of paper (Whatman No. 4), previously humidified with pH 4.0 acetic/acetate buffer solution, after which the paper was dried and placed between two quartz plates. The diffuse transmitted phosphorescence intensity was measured directly at λex = 303 nm and λem = 472 nm. The applicable concentration range was 160.0–1200.0 ng/ml, with a relative standard deviation of 1.2%. The detection and quantification limits were 47.7 and 158.9 ng/ml, respectively. This simple method was used to measure the levels of this pesticide in potatoes, green beans, lettuce and different types of waters, showing good selectivity in all instances.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01242916
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