Level 1 Gravity Control (25 mL)

The DRI Gravity-Detect Test can be performed on automated clinical chemistry analyzers. This method is based on a linear relationship between the urine chloride ion concentration and the specific gravity. Chloride ion and ferric perchlorate in an acidic medium form a FeCl2 complex with an absorbance maximum at 340 nm. The absorbance at 340 nm is directly proportional to the urine chloride concentration. A linear two-point calibration curve can be established and the sample urine specific gravity value can be extrapolated from the calibration curve using the corresponding absorbance result.