Abstract
Summary
A photometric method is described based on the gravimetric procedure of Butler and Tuthill in which the precipitated sodium zinc uranyl acetate is dissolved in water, giving a yellow color which is read with a suitable filter against a standard curve at 430 mμ. Phosphates in the normal urine were found to exert negligible interference. Recoveries and comparison values show the method to be more rapid and at least of equivalent accuracy with the gravimetric procedure.
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