Quantitative analysis of iron ions in P507
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Is there any marine enthusiast who can provide a method for analyzing the iron ion content in P507?
It is not yet known how to directly detect the metal content in the extract; the usual approach is to thoroughly back-extract the quantified extract, analyze the amount of metal in the back-extraction solution, and then calculate the corresponding value. This is how we control it in production.
As mentioned above, it is possible to measure it indirectly: take a certain volume of P507 containing iron, leach it using 6 mol of hydrochloric acid, analyze the amount of iron in the leachate, and then convert that value back
All the above testing methods assume that the organic phase contains only iron. But in actual production, such a situation is completely impossible to occur. In most cases, the iron content in the organic phase is not even as high as that of some other metal elements; sometimes it is even much lower than that of other elements. Therefore, the results from the above testing methods may still require analysis.