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On‐line Determination of Nitrite in Water‐Miscible Cooling Lubricants
Author(s) -
Hantelmann K.,
Ulber R.
Publication year - 2003
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200303030
Subject(s) - nitrite , emulsion , aqueous solution , chromatography , chemistry , analytical chemistry (journal) , organic chemistry , nitrate
The determination of nitrite in water‐miscible cooling lubricants is problematic in so far as nitrite occurs in an emulsion instead of an aqueous solution. Accordingly, methods like photometry, ion chromatography or gas‐sensitive methods require multistage sample preparations and a large amount of equipment. In this paper, a simple and on‐line processable method for nitrite determination in water‐miscible cooling lubricants is presented. The determination is carried out potentiometrically by using an ion‐selective electrode.