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Baksi K, Pal BK. Nonextractive spectrofluorimetric determination of aluminium in real, environmental and biological samples using chromotropic acid. Talanta. 1994;41(1):81-7doi: 10.1016/0039-9140(94)80171-1.
Baksi, K., & Pal, B. K. (1994). Nonextractive spectrofluorimetric determination of aluminium in real, environmental and biological samples using chromotropic acid. Talanta, 41(1), 81-7. https://doi.org/10.1016/0039-9140(94)80171-1
Baksi, K, and Pal, B K. "Nonextractive spectrofluorimetric determination of aluminium in real, environmental and biological samples using chromotropic acid." Talanta vol. 41,1 (1994): 81-7. doi: https://doi.org/10.1016/0039-9140(94)80171-1
Baksi K, Pal BK. Nonextractive spectrofluorimetric determination of aluminium in real, environmental and biological samples using chromotropic acid. Talanta. 1994 Jan;41(1):81-7. doi: 10.1016/0039-9140(94)80171-1. PMID: 18965890.
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Talanta. 1994 Jan;41(1):81-7. doi: 10.1016/0039-9140(94)80171-1.

Nonextractive spectrofluorimetric determination of aluminium in real, environmental and biological samples using chromotropic acid.

Talanta

K Baksi, B K Pal

Affiliations

  1. Analytical Chemistry Division, Chemistry Department, Jadavpur University, Calcutta 700 032, India.

PMID: 18965890 DOI: 10.1016/0039-9140(94)80171-1

Abstract

An ultra-sensitive and highly selective nonextractive fluorimetric method is presented for the rapid determination of aluminium at nano-trace levels using chromotropic acid as a fluorimetric reagent [lambda(ex) = 360 nm and lambda(em) = 390 nm] in the pH range of 4.1-4.7. The fluorescence intensity of the metal chelate (2:3 complex) reaches a constant value within 1/2 hr and remains unchanged for over 48 hr. The fluorescence intensity aluminium concentration calibration curve is collinear between 1 and 300 ng/ml of Al. A constant fluorescence intensity is obtained over a wide range (1:50-1:1500) of Al:reagent molar concentrations. Large excesses of over 60 cations, anions and complexing agents (like tartrate, oxalate, phosphate, thio-urea, SCN(-), etc.) do not interfere in the Al determination. The developed method was successfully used in assaying aluminium in several standard reference materials (Al-bronze, brass, stainless steel) as well as in some environmental and biological samples. The method is very precise and accurate (S.D = +/-0.001 on 10 ng/ml; 11 determinations).

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