en1122公式中的F是什麼？

謝你啦 。我的標准只有公式，卻沒有說明C、F、M、R各個的意思。

标准上面讲得很清楚的啊：F:the dilution factor of the test solution and the reagent blank solution.M:the mass, in grams of the test portionC:the cadmium concentration in milligrams per litre of the test solution R:the cadmium concentration in milligrams per litre of reagent blank solution