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  1. dwalter68

    Properties of alcohol mixtures.

    Hello- I need some expertise about what properties result when different alcohols are mixed in liquid form. I particularly need to know what vapor pressure will result from a mixture of 1-octanol (vp of 0.1 mmHg @20C) and 1-propanol (vp of 15 mmHg @20C). If I mix them will get a vp that is...
  2. dwalter68

    Need source for permeability values for Viton

    Hello- Does anyone know a good source for gas permeability values for viton (a trade name for a fluoroelastomer material)? I can find information for common gases like nitrogen, oxygen, etc. I need it for methyl salicylate, 1-octanol, ethylene glycol, and dimp (diisopropyl methylphosphonate)...
  3. dwalter68

    Membrane to cover vial and allow alcohol vapor to pass

    I am working outside my area of expertise and need help selecting a membrane to meet the following criteria: -To be used as a septa for a small autosampler vial. The vial will be used as a test device for a chemical sensor. -The vial will hold a liquid sample of 1-propanol or 1-octanol at room...
  4. dwalter68

    How to calc. amount of liquid going to vapor in closed container

    Yes, when I wrote R in my formula, I was actually referring to the specific Rs for ethanol. Also the ethanol is pure 200 proof and it is at ambient temp. My thanks to all for your help.
  5. dwalter68

    How to calc. amount of liquid going to vapor in closed container

    I am sure this is a simple question for someone with chemical background. I need to make sure I have solved this problem correctly. I take an open container and fill it partially with ethanol. Then I seal it up and assume no leaks. Note that the container is not evacuated of air beforehand and...

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