If I may start a new thread just for the purposes ...
This question may just be answered by Doremus but others may also know.
The David Kachel articles describe how to make a potassium ferricyanide solution for use in the SLIMT process.
As I read it, 100g of potassium ferricyanide powder is mixed with 1 litre of water to make a stock solution. This stock solution is then watered down further to make a concentrated working solution. Can I ask what percentage you would call the stock solution in this example? Is this what you'd call a 10% solution ?
The 'concentrated working solution' is made by mixing 100ml of stock to 900ml of water. This would be what percentage ? Is this another 10% solution making it overall a 1% solution at this stage.
The instructions for using the bleach call for a further dilution to a 'final working solution'. This is suggested to be 20ml per litre of water of the above concentrated working solution. Would you then call this final working solution a 20/1000 * 1 = 0.02% solution ? Or do you call it a 0.002% solution ?
The use of percentages can be a little difficult to decipher at times ...
Cheers,
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