More than likely, if it was positive when given, it will stay positive even after 4 weeks. I am not sure how long the lab keeps your urine, but most don't take that long before testing.
Labs Testing
The number of labs that test suboxone levels in urine can vary by region and specific testing capabilities. Many clinical and toxicology laboratories offer this testing, particularly those specializing in substance use treatment. It's best to consult local medical facilities or addiction treatment centers to find specific labs that conduct suboxone level tests.
There is no all-inclusive list of material testing labs in Virginia. Chesapeake Material Testing Labs, E-labs, NanoSafe, and Dominion Engineering are among the material testing labs operating in Virginia.
some labs keep the urine frozen for up to one year but say it depends on what drug their tesetng for. They can keep it in the fridge for 1 week before it is discarded.
WHQL- Windows Hardware Quality Labs testing
One of the most highly regarded test labs is Consumer Reports; they test a wide variety of products on consumer and corporate levels. Independent testing labs for DNA, product nutrition and safety include UL / Underwriters Laboratory, Beackon DNA Testing, Breachway Labs, ParmCo, Atlantis Testing andTestLabs
Some labs do and some labs don't. To be safe, I would assume that they do. It is very easy to distinguish male urine from female urine.
if your a woman you can use male pee, but a man may use woman pee and show up poregnant
of course
Windows Hardware Quality Labs (WHQL) testing
Yes, laboratories can often differentiate between male and female urine in testing for tobacco use, primarily through the analysis of certain biomarkers and metabolites. For instance, levels of specific hormones and creatinine can vary between genders, which can provide clues about the urine's origin. However, standard tobacco tests typically focus on detecting nicotine and cotinine rather than determining the gender of the sample.
Yes, however to test for heavy metals in the seafood - you'd have to work with a forensics laboratory. Your typical blood labs are for just that - blood (and urine, salivia, etc.), not for any non-human testing