|
Title
|
|
|
|
Co-crystallization with 1-(2-pyridylazo)-2-naphthol, and X-ray fluorescence, for trace metal analysis of water
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| Adding 20mg of 1-(2-pyridylazo)-2-naphthol (PAN) to a water sample at 70°, and filtering off the precipitate after cooling, gives efficient preconcentration prior to X-ray fluorescence analysis of water. Up to the capacity of about 100 μeq of PAN used, the trace metal recoveries are around 90% or higher for Cr3+, Mn2+, Ni2+, Cu2+, Zn2+, Hg2+ and Eu3+, and above 70% for many other ions. The recovery yields usually do not vary critically with pH in the neutral pH-range, and are practically independent of the sample salinity, sample volume and trace-metal concentration. Enrichment factors as high as 2 × 105 can be achieved. Counting statistics would then allow detection limits of 0.03 ppM. The blank levels in commercial PAN, however, lead to typical detection limits of about 1 ppm. The coefficient of variation is typically in the 510% range at the 10-ppM level. The accuracy and applicability of the procedure are illustrated by comparative analyses on samples of synthetic solutions, river and drinking water. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Talanta : the international journal of pure and applied analytical chemistry. - Oxford, 1958, currens
| |
|
Publication
|
|
|
|
Oxford
:
Pergamon
,
1978
| |
|
ISSN
|
|
|
|
0039-9140
[print]
1873-3573
[online]
| |
|
DOI
|
|
|
|
10.1016/0039-9140(78)80166-0
| |
|
Volume/pages
|
|
|
|
25
:11/12
(1978)
, p. 653-658
| |
|
ISI
|
|
|
|
A1978GG18200005
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (publisher's version - intranet only)
|
|
|
|
| |
|