Determination of Citric Acid in Urine by Enzymatic Flow Injection System Based on a Novel Microfluidic Chip

Resnick, M., and Andrew C. Novick. Urology secrets. New Delhi: Jaypee Brothers, 1995. Batinic, 2004, The value of urine citrate/calcium ratio in the estimation of risk of urolithiasis, Clinical nephrology, 61, 387, 10.5414/CNP61387 Marangella M, Bianco O, Grande M L, et al. Patterns of citrate excretion in healthy subjects and patients with idiopathic stone disease. 1987. Parks, 1986, A urinary calcium-citrate index for the evaluation of nephrolithiasis[J], Kidney Int, 30, 85, 10.1038/ki.1986.155