On the subject of guessing the contents of KHCA, I noticed that the 1 US
gallon pack contains 502g of powder. (Nice to see the USA a little bit
metricated). This is eqivalent to 132.6g of powder for 1Litre of stock
solution. If (a big IF) the stock contains 100g sodium sulphite and 20g
sodium metabisulphite, it leaves 12.6g for the EDTA4Na and sodium
citrate. Just guessing. It couldn't be that easy.
==========================
At 09:24 AM 6/04/2006, you wrote:
On Wed, 5 Apr 2006 16:16:58 -0700 (PDT), "Eric Nelson" <emanmb@xxxxxxxxx> said:
> So I take it the consensus here is that 2-5 gms of EDTA and sodium > citrate (not citric acid, right?) should be used with this wash aid > formula with hard city water and especially if the solutions will be > stored in stock dilutions. I just want to use a safe mixture without > calcium scale risks, etc. I use a gallon of stock every 2-3 weeks so > comparatively, an extra gram or 2 of one or 2 compounds doesn't tip > the scale much in terms of cost for me.
I'd use 2 to 5g tetrasodium EDTA and 5g sodium citrate. You can put more of these with no harm, within reason, but just more waste. ===============================================================
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