High Potency CDS Making -- Jim Humble Method

I made a batch of high potency CDS following Jim's latest CDS instruction video dated 9-Feb-2012

I tested it after running one batch of 1 fl.oz. (30 ml) MMS for 20 minutes; then ran another batch of 1 fl.oz. (30 ml) MMS into the same 4 fl.oz. (118 ml) CDS for 20 minutes and tested again.

I conclude from these results that Jim Humble's instructions are accurate and anyone who follows them should get approximately 10,000 ppm CDS after reacting a single 1 fl.oz. (30ml) batch of MMS into 4 fl.oz. (118ml) of distilled water. Reacting a second 1 fl.oz. of MMS into the same 4 fl.oz. of CDS should give you 4 fl.oz. of approximately 20,000 ppm CDS.

METHOD
reaction chamber: 2 fl.oz. baby bottle; 1 fl.oz. (30ml) MMS, 1 fl.oz. (30 ml) citric acid 50%.
receiving chamber: 6 fl.oz. wine bottle tall & skinny; 4 fl.oz. (118 ml) room temperature distilled water.
tubing: 1/4 inch OD polyethylene, no diffuser
temperature: barely boiling
time: 20 minutes
water: all references to water are distilled water.

The test results are placed in tables and our good friend Charlotte from here on the forum placed them into a PDF format. (Thanks Charlotte!)



Observations: Still observing that LaMotte strips in the high range (500-250 ppm) are showing double the ppm as tests diluted to the mid range (100-50 ppm). This is a big problem. The LaMotte strips seem to be pretty inaccurate on the super high potency above 10,000 ppm. The meter seems to be inaccurate if you run 2 batches into the same CDS and try to test on a 1:1000 dilution; dilution needs to be .5 ml:1000 or more.

Conclusions: LaMotte strips vary by 100% between high end and mid range dilutions. Need to use higher than 1:1000 dilutions with the meter at these high potencies and do more testing, results are varying more. I think the meter does show that the first batch was about 10,000 ppm and the second batch was about 20,000 ppm, but it seems to become less accurate at the high ppms also.

Michael