Government scientists in Western Australia are developing a test to detect synthetic urine products.
Fake urine is being sold online and there are concerns people could use it to try to beat workplace drug tests.
The Manager of Forensic Toxicology at ChemCentre Robert Hansson says the products have been around for years but are attracting more attention through the internet.
He says a number of workplace drug testing agencies have asked the laboratory to investigate the products.
"I would imagine some will be easily identified as fake and others might be a bit more sophisticated but at the end of the day urine is a reasonably complex mixture of chemicals and materials so to get a urine which is very close to the real thing would I think, be a fairly expensive exercise," he said.
"We're trying to identify something in the urine which is unique to synthetic or fake urine which shouldn't be present in real urine and we'll keep that a secret and when people request the sample to be done we will look for that particular marker."
Mr Hansson says until a test is developed, employers have been given advice about how to combat the issue such as using special cups which contain gauges to monitor unusual temperature readings.