anyone knows about determination of water content in bio-oil, please tell me the detail. I am going to use dean stark soxhlet extraction apparatus anyway.
thanks

If you want to find out a water content of 0.10% and above,then Dean Stark Apparatus is good.For below 0.10%,the Karl Fischer Method is better.

Crackle test also indicates water content.

Exactly what Krishnakumar said, but would raise the minimum limit for accurate water testing by Dean&Starke to 0.5%. Some labs really struggle to get an accurate water measurement from Dean&Stark.

An introduction to the crackle test: (keep in mind the crackle is a general guide to water content).
http://www.practicingoilanalysis.com/Backup/199809/crackle2.html

You could also look into water determination by using 'calcium hydride' - although not sure how it would react to a bio oil.

hello
to determinate the water contenent of 0.5% and above, we use the Dean Stark metode. We also need to measure the water contenent in dieletric oil (<40 ppm).Anyone know any metod except Karl Fischer