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Post by rayrocketman on Jan 25, 2020 19:52:54 GMT
This may be a more feasible approach, particularly if split among several users. If the price was not prohibitive, and the purchase was late summer to avoid the locally high summer temperatures, I would certainly be interested in participating in a group purchase. We should probably have motors ready for testing prior to purchase.
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Post by crpearson on Feb 4, 2020 17:54:06 GMT
It seems like these days a small test rocket engine is a required bit of kit for testing HTP. I am also interested in a group buy.
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Post by rayrocketman on Feb 9, 2020 3:12:19 GMT
It seems to be there are two obvious ways to test for peroxide concentration
1) measure the density with a hydrometer
2) measure the refractive index.
Of the two, the refractive index test seems like it could be very accurate and precise if you were measuring small angles over a long distance.
Distilled water is fairly easy to use for a calibration, and a precisely measured addition of dissolved salt or sugar should be easy enough to simulate any concentration of H2O2.
A hydrometer is dead simple and inexpensive, however. An alternative would be to measure out a precise volume using a burette and simply weigh it, depending on the accuracy of your scale.
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