Too bad youve already took your test....otherwise:


You could test the synthetic batch with a Urinecheck7 validity strip to ensure that the creatinine, sg, and pH are all okay. You can find these test strips online (by doing a Google search) and theyre cheaper than dirt.
If your synthetic batch passes the home validity test, simply strain out the foreign particles, using a section of an old nylon stocking.

...Too late now.