Article | REF: BM6017 V1

Hydraulic fluids - Analysis methods

Author: Gérard DALLEMAGNE

Publication date: October 10, 2003

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12. Determination of other chemical elements

12.1 Total chlorine content (Cl–)

Among other methods, the total chlorine content (Cl ) of hydraulic fluids is determined by "coulometry-argentiometry", using a non-standardized method developed specifically for this type of product by the EADS Joint Research Centre. The hydraulic fluid is diluted 50/50 in acetone. The test sample, between 25 and 50 µL, is injected via a microsyringe into an oven heated to 1,050°C for mineralization, where it burns under a current of oxygen.

The chlorine, converted into chloride ions, is carried by the oxygen stream and bubbles into a microcell containing an electrolyte, an isopropanol-based solution of composition :

  • isopropanol:...

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Determination of other chemical elements