檢驗方法：
Spectrophotometric Method
生物參考區間(REFERENCE RANGE)：
干擾物質：Peritoneal, pleural, and drain fluid concentrations should be compared to serum or plasma. Fluid to serum ratios above 1.0 suggest the specimen may be contaminated with urine
臨床意義 or 實驗室解釋：
Identifying the presence of urine as a cause for accumulation of fluid in a body compartment
Measuring the ultrafiltration capacity of the peritoneal membrane in patients receiving peritoneal dialysis