When they check the creatinine level, they will also check the pH and SG levels as well.
The creatinine levels and SG levels are checked together in order to arrive at a "diluted" result.

Under US Federal regulations, a "diluted" result is determined when the creatinine level is between 2 - 20 mg/dl and the SG reading is between 1.0010 - 1.0030 on a single aliquot.
Burnt Toast Reviewed by Burnt Toast on . Keeping clean specimen for extended amount of time? I found this post and it was exactly what I was looking for so I figured I would copy and paste it. He never got a reply so I was looking to see if I could get some answers. FYI: since I have to take supervised tests from time to time and many of my friends drink and toke, it's often hard to find someone to give me a clean specimen. I can catch some of them at the right time and I would like to get a friend to just give me a large amount to keep on freeze so that each time I need it, I won't Rating: 5