It’s normal to find amorphous sediment in healthy urine, so its presence is not necessarily an indicator of any underlying disease. Calcium oxalate, amorphous phosphates and triple phosphate crystals are found in healthy urine. They are often found in the urine of healthy individuals, particularly those whose urine tends to be neutral or slightly alkaline.
Urinary tract infections raise the pH level of the urine and increase free ammonia. A normal freshly voided specimen contains little free ammonia; this substance is mainly generated by urea splitting bacteria. With a first-morning fresh specimen, triple phosphates can indicate urinary tract infection. Otherwise, phosphates are of little clinical value.