It's not good anymore for testing once cold, it has to be fresh warm urine for the test to work properly.
If properly sealed and stored, urine samples are good for testing up to 24 hours after the sample given. The urine sample should be in a sterile container within a sealed plastic bag and stored in a refrigerator.
A urine sample may not be good for lab testing if it is contaminated with water, soap, or other substances, as this can affect the accuracy of the results. Additionally, if the sample has been improperly stored or is too old, it may not provide reliable results.
just pee in cup let temp go to 98 and stablize then pour out bad urine and put good urine in cup temp won't drop fast your good to go
Urine samples can typically be stored at room temperature for up to 2 hours before they start to degrade. However, for more accurate results, it is best to refrigerate the sample and test it within 24 hours. After that time, the sample may no longer provide accurate test results.
A urine sample usually lasts up to 7 days if frozen.
Urine, when stored in an air tight container, free from contamination and help under constant specified temperature can be used for drug testing over a lengthy time period. Frozen urine can be kept indefinitely for testing.
about two months...
== == That depends on what you're testing for. Urine drug levels are good at room temp or in the fridge for several days. Microalbumin testing is also good for several days in the fridge. However, if the urine is being collected for a routine urinalysis or a microscopic, the urine needs to be tested as soon as possible. Cellular components, bilirubin, and urobilinogen break down quickly after specimen collection, and bacterial growth causes glucose to decrease and protein and pH to increase. In my laboratory we only accept urines for urinalysis within 2 hours of collection if held at room temp, or within 4 hours if kept refrigerated.
That means you've been dead for many hours. Call the coroner. REAL ANSWER (this guys right but mocking your real question) The thing is... cold is relative to what your interpretation of warm is. If your urine feels cold, then you're probably in a warmer/hot place and your sense of touch has adjusted.
to produce a product with zero defects
Better up the nose. ----------- Answer 2: ----------- I imagine it depends on the source of the urine. If you are curious, conduct a small test. If you see no benefits from using it or you see undesirable affects from using it, then discontinue your testing.