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
References
Standardization. Specifications
Association française de normalisation AFNOR
http://www. boutique.afnor.fr/
- Hydraulic transmissions – Fluids – Measurement of mineral oil filterability. Classification number : E48-690 - NF E 48-690 - 12-90
- Liquid petroleum products – Vapour pressure – Part 2: Determination of absolute vapour pressure (AVP)...
Hydraulic fluid analysis methods
Table 1 shows the equivalences between the various standards recommended by European and American standards bodies.
The numbers in the table refer to the comments below.
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