One more link:
Erowid Drug Testing Vaults : The Basics

SAMPLE VALIDITY VERIFICATION TESTING
SAMHSA's testing protocol also requires that labs verify the 'validity' of the urine samples collected to check to make sure they are not adulterated or have been tampered with to interfere with the results. They require that the lab "(1) Determine the creatinine concentration on every specimen; (2) Determine the specific gravity on every specimen for which the creatinine concentration is less than 20 mg/dL; (3) Determine the pH on every specimen; (4) Perform one or more validity tests for oxidizing adulterants on every specimen; and (5) Perform additional validity tests when the following conditions are observed: (i) Abnormal physical characteristics; (ii) Reactions or responses characteristic of an adulterant obtained during initial or confirmatory drug tests (e.g., non-recovery of internal standards, unusual response); or (iii) Possible unidentified interfering substance or adulterant. The choice of additional validity tests is dependent on the observed indicators or characteristics as described in (i), (ii), and (iii) of this section.". Source Federal Register: April 13, 2004 (Volume 69, Number 71), Page 19659.

Another thing to consider. You got online, found and ordered this product no problem right? What makes you think the lab testing you didn't do the same thing? It's not hard to see that if they did then there is a pretty good chance they found a way to distinguish synthetics from the real stuff if they choose to put the effort in. And the argument that if there is no standard cut off level of uric acid is valid, but there was NONE in my sample (according to them).
Seriously this is starting to piss me off. I am just relating my story, and trying to help people not end up in my situation. If anything I have said time and again that quick fix might work for you, not that it is a bogus product. I am only advocating for people to abstain instead of using quick fix if that is an option for them. Again, if that is not an option then yeah, I would probably try quick fix (as long as it was a different lab).