If you're a tester: yes, though the quality of some tests may suffer as a result.
If you're a testee: yes, though the testers will be able to tell and may want to ask you some potentially embarrassing/incriminating questions as a result.
Yes that shouldn't affect the urine.
no
not if it's kept refrigerated, but then it's harder getting it back up to 98 degrees
The storage method you use will determine how long urine will stay fresh. Samples should be stored in a refrigerator, or vacuum sealed. As long as the sample remains in its vacuum seal it may be kept at room temperature away from direct sunlight for days at a time. It will be good for up to six months, in the vacuum seal, if stored in the refrigerator.
yes
It will make everything level out. Stuff that does positive will be less visible and stuff that shows negative will look more positive
yes
no it will not work after five days unless it has been refridgerated n the only way it will work is if u refridgerate it immediately
if you take concerta and stop and have to take a drug test two days later, will concerta show up at all.
I want to know can i take a postive urine sample of loritab and refridgerate it for a later test /
the test can result in negative but with that said the urine would not be body temperature and that would be a huge red flag to whom ever is giving the drug test. so yes you could pass but the test giver would know it's probably not yours.
depends what you mean by fresh. If you mean no bug growth then it also depends on the preservatives. No preservatives, less than 24 hours. with boric acid preservative, maybe a weekend. If you mean the substances tested in the urine. e.g. glucose, bence Jones protein etc, then it depends on what the test is for. The fresher the sample, the more accurate the result
You can use a clean friend's urine, or some companies sell synthetic urine designed for tricking drug tests.