detection of rosin concentration in a flux 1

[gtpro]

Is any one beware of a quick method to detect the concentration of rosin in flux. The flux is used in soldering process. It normally has 95% 2-propanol, 1-2% rosin and some other additives. I'm looking for a quick, convenient way to detect the change of rosin concentration because of evaporation. Thanks for advices.

GTpro

 

[rhodie]

Take a viscosity reading of the flux at optimal water concentration. Compare all additional readings to this temperature.

The thickness of the flux will tell you how much water has evaporated, therefore indicating the rosin concentration.

 

[gtpro]

Thanks for the response. You mentioned water based flux. What about an alcohol based as I used?
GTpro

 

[rhodie]

Sorry, I should have read a little more closely to begin with.

I don't think the method of testing would have to change any (you could still use a viscometer), but I'm not sure how much different the viscosity would change as a result evaporation. You'd have to get a pretty sensitive instrument to detect the changes you need to measure.

Maybe you could look into turbidity meters as well. They can be used measure the amount of suspended solids in a otherwise clear solution. I would assume that the less alcohol your flux has, the more dense the solution would become. I'm not so familar with these meters, but you could at least investigate it a bit more.

 

[gtpro]

Thank you very much for the information. It's very helpful for me to begin.