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The automated determination of alkyl aryl sulfonates in spray‐dried detergents by ultraviolet absorption
Author(s) -
Brandli E. H.,
Kelley R. M.
Publication year - 1970
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02638870
Subject(s) - autoanalyzer , absorbance , chromatography , alkyl , ultraviolet , chemistry , aryl , analytical chemistry (journal) , absorption (acoustics) , materials science , organic chemistry , optoelectronics , composite material
An automated procedure has been developed for the determination of alkyl aryl sulfonates in spray‐dried detergents. It is based upon the ultraviolet absorbance of alkyl aryl sulfonates at 224 mμ. A Technicon Solid Preparative Sampler is employed to dissolve the sample, dilute it to a fixed volume and remove and aliquot for analysis. The sample aliquots are continuously fed by a Technicon Proportioning Pump to a flow cell in a recording spectrophotometer. All operations, excluding sample weighing, are automatic and analyses can be carried out continuously at the rate of 10 samples per hour. The method has been found to have a coefficient of variation of 3.5%.