Why should a urine sample be fresh when it is tested?

This is to preserve the urine sample until its tested.

Because if you don't have a fresh sample you won't get an accuate reading.

The first morning urine will give the best result.

Men can be tested for chlamydia. Typically, the test is done on a urine sample.

A urine sample usually lasts up to 7 days if frozen.

No . The urine should be tested immediately with a home test or the sample provided at the doctor's office or clinic. Sometimes you will be asked to bring a sample to the lab of the 1st urine you pass in the morning. But it should be that same day, not stored for 3 days.

Testing for alcohol can be performed with an alcohol breath machine, with a sample of blood drawn, with a sample of urine, with a sample of mouth fluid, or with a sample of sweat.

Only a small amount is used for any given test so a sample could be tested many times.

If temperature is being used to verify that the urine came from the correct person the temperature of the sample is an indicator that the urine is/may not be a fresh/valid sample...if the temperature is lower than expected.

collected at a specific time and is tested for of glucose and acetone

Getting checked for chlamydia is as easy as putting a urine sample in a cup. It's better to know your status; get yourself tested.

To know whether you have gonorrhea, you should get tested. Testing is simple and painless, using a urine sample or an oral or anal swab.

6 hours, 12 hours in the refirgerator.

Bacterial contamination will cause no effects if the sample is tested directly after collection. However, if the sample is allowed to sit, bacteria will multiply and raise the urine pH. Urine pH above 8 is abnormal.

The only way to be sure is if they actually watch you urinate and supply the sample to be tested.

It depends on how the first sample was tested. If the first half was tested on a dipstick test and you KNOW you haven't been doing drugs--say, you're taking naproxen sodium for knee pain and you come up positive for marijuana (naproxen cross-reacts with the THC test), testing the split sample with GC/MS should clear you. OTOH, if you smoke weed and your first sample came up positive on GC/MS, assume the split sample will…

It's not good anymore for testing once cold, it has to be fresh warm urine for the test to work properly.

When you submit a urine sample at the drug testing laboratory, the temperature of the urine is tested and you cannot bring a sample of urine which has been in the fridge. Once the urine is delivered, it is tested before it is refrigerated. There are changes in urine which can be detected by a microscope to see if it has been in the fridge even if you do manage to warm it to body…

Testing for chlamydia and gonorrhea usually involves a swab or urine sample, depending on the patient history.

that its old, fresh urine samples are usually between those temperatures. So if taking a drug test it can spotted that someone may have brought in someone else's urine because it isn't hot/fresh

Urine is tested by doctors if they suspect cystitus or if you are diabetic

Chlamydia and gonorrhea are tested with a sample of fluid from the vagina, urethra, rectum, throat, or eyes. Most commonly, a urine sample is used. Testing is painless.

So that the sample can be run twice. It's a standard in forensic science to that verifies the results of testing.

there are many myths. somethings work for some people but not others. you should have quit if you knew you were getting tested.

urine sample should be between 98-100 degrees F, I got this info at a store that sells pass urineproducts test