Matthi05 Posted October 31, 2015 Share Posted October 31, 2015 (edited) I'm looking for liquids I can use for my tests on granular fertilizers. Water is not an option because fertilizers dissolve in it. I'm thinking of vegetable oils like rapeseed oil, soybean oil or a mineral oil like liquid paraffin. But the relative high viscosity is not desirable. If possible: non-dangerous/toxic liquids. Can anybody help me out? Thanks in advance. Edited October 31, 2015 by Matthi05 Link to comment Share on other sites More sharing options...
studiot Posted October 31, 2015 Share Posted October 31, 2015 White spirit is probably your best bet. However you would need to test for insolubility of your powder. 1 Link to comment Share on other sites More sharing options...
Sensei Posted November 1, 2015 Share Posted November 1, 2015 Why not use gas pycnometer? https://en.wikipedia.org/wiki/Gas_pycnometer You wouldn't have to worry about which liquid to use.. Link to comment Share on other sites More sharing options...
John Cuthber Posted November 1, 2015 Share Posted November 1, 2015 Why not use gas pycnometer? https://en.wikipedia.org/wiki/Gas_pycnometer You wouldn't have to worry about which liquid to use.. It's roughly a thousand times easier to weigh liquids than gases. Link to comment Share on other sites More sharing options...
Sensei Posted November 1, 2015 Share Posted November 1, 2015 It's roughly a thousand times easier to weigh liquids than gases. Gas pycnometer doesn't measure mass, but volume of gas. "Gas expansion pycnometer is also known as constant volume gas pycnometer. The simplest type of gas pycnometer (due to its relative lack of moving parts) consists of two chambers, one (with a removable gas-tight lid) to hold the sample and a second chamber of fixed, known (via calibration) internal volume referred to as the reference volume or added volume." Link to comment Share on other sites More sharing options...
John Cuthber Posted November 1, 2015 Share Posted November 1, 2015 Fair point, but I'd say it was still about a hundred times easier to measure the weights of some solids and liquids than the pressure of a gas sample. And the requirement for thermosetting a liquid filled pycnometer is a bit les challenging too. Realistically, "white spirit" is the right answer here. Link to comment Share on other sites More sharing options...
studiot Posted November 1, 2015 Share Posted November 1, 2015 I'm not sure what the american for 'white spirit' is. Link to comment Share on other sites More sharing options...
Matthi05 Posted November 3, 2015 Author Share Posted November 3, 2015 (edited) Thanks for the reactions. White spirit seems a good option. I will also use a gas-pycnometer. But I want to look at the different types of density. http://www.particletesting.com/Repository/Files/density_determinations.pdf Edited November 3, 2015 by Matthi05 Link to comment Share on other sites More sharing options...
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