Are there any non-discriminant enzymes that will break down all organic P to P for fluorometric analysis in seawater? Persulfate digestion is a popular method, but since this is seawater, it is my understanding that potential chlorine interference requires that digestion occur in an open vessel. Dealing with such small volumes, I worry persulfate digestion might not be appropriate. I am also curious about an appropriate method to determine condensed P. I am a beginner at nutrient testing, but nobody around me that I know does this detailed of P analysis. Thanks.
Thanks. I should have been more clear in my question. What I am really looking for is a fluorometric method to determine organic P and condensed P, where organic = total - condensed - inorganic. It looks like the MB method in the paper you shared is for inorganic. I am starting to gather that autoclaving with sodium sulfite might get around the chlorine-interference problem.
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