 |
Volume 46, Number 1
(January - February 2001) |
|
Volume 46, Number 1
(January - February 2001) |
Determination of Aluminum with Dibromo-o-nitrophenylfluorone by Primary-Secondary Wavelength Spectrophotometry
by Hong-Wen Gao and Lin-Qian Yu
School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, P.R. China
Key words: aluminum, dibromo-o-nitrophenylfluorone, primary-secondary wavelength spectrometry
The reaction between aluminum (Al3+)
and new chromogenic reagent, dibromo-o-nitrophenylfluorone (DBNPF) is sensitive
at pH 8.5 and selective in the presence of sodium cyanide. Because of the
effect of excess of DBNPF, the new procedure named as primary-secondary
wavelengths spectrophotometry (PSWS) is applied in the detrmination of
trace amounts of aluminum instead of the ordinary spectrophotometry. This
work shows that such a method gives better precision and lower detection
limit than the ordinary method. By analyzing several samples and comparing
data obtained with the conventional method, all results are satisfactory.
back
to table of contents