CAPILLARY ELECTROPHORETIC ANALYSIS OF THE SODIUM-SALT OF NAPHTHALENESULFONIC ACID, FORMALDEHYDE POLYMER IN WASTE-WATER USING A POLYETHYLENEGLYCOL-COATED CAPILLARY
Aj. Nitowski et al., CAPILLARY ELECTROPHORETIC ANALYSIS OF THE SODIUM-SALT OF NAPHTHALENESULFONIC ACID, FORMALDEHYDE POLYMER IN WASTE-WATER USING A POLYETHYLENEGLYCOL-COATED CAPILLARY, Journal of chromatography, 717(1-2), 1995, pp. 363-370
Citations number
15
Categorie Soggetti
Chemistry Analytical","Biochemical Research Methods
Industrial surfactants such as the sodium salt of naphthalenesulfonic
acid, formaldehyde polymer are widely used in manufacturing for proces
s control. These water-soluble materials are eliminated with the waste
water. This necessitates sensitive and accurate determinations of sur
factant concentration in effluents as a prerequisite for effective pol
lution abatement. Monitoring the concentration of these surfactants by
conventional spectrophotometric tests which are currently in use is n
on-differentiating and subject to gross interferences by many sources.
Alternatively, determination of the above surfactant by HPLC methods
has not been effective at resolving the various ionic species found. T
his work describes the selective separation of anionic species by the
suppression of the EOF through the judicious choice of a commercially
available coated column which increases selectivity by eliminating neu
trals and cations through a bi-directional separation system. This is
a significant enhancement over traditional approaches like HPLC which
observe all UV-absorbing components and interferences. This selectivit
y is superior to that of the UV methods generating comparatively equiv
alent CE results when no interferences are present, and more accurate
CE results when interferences are present.