[Effect of urinary pH value on the composition of urinary nanocrystals].
The effect of urinary pH value on the composition of urinary nanocrystals was investigated by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The differentiation of composition of urinary nanocrystals not only occurred between the people with different urinary pH, but also occurred in the same person when his or her urinary pH changed. At lower urinary pH (such as pH<5.8), most of the urinary components are uric acid, acidic phosphate, calcium oxalate etc. However, most of these components are urate, phosphate, magnesium ammonium phosphate, calcium oxalate etc at higher urinary pH (such as pH>6.2). Combining XRD and FTIR methods, t he compositions o f urinary nanocrystals can b edetermined accurately. It is helpful to exploring the cause of urinary stones.
Xu
Xiao-Jing
XJ
Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China.
Wan
Mu-Hua
MH
Ouyang
Jian-Ming
JM
D002118:Calcium / Q000652:urine; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D014527:Uric Acid / Q000737:chemistry*; D014545:Urinary Calculi / Q000737:chemistry*; D014961:X-Ray Diffraction / Q000379:methods*; D014965:X-Rays
D014527:Uric Acid; D002118:Calcium