All that glisters is not gold

I would have thought that "scientists" working in a science department would have some knowledge of chemistry, or at least enough to know that elemental synthesis requires extraordinary conditions. If you find 3 mg/L gold in the urine of a cow, the grass you fed it must have had much more. So lets look at the wonder grass instead.  According to them, the clear indication of the presence of gold is the yellow colour of the urine. Really? "All that glisters is not gold, often have you heard that told..." or in this case all that's yellow is not gold.
What method did they use for the estimation of gold I wonder.
It reminds me of the crime-drama serials I love to watch---CSI, Bones etc where they do a GC-MS of some tissue sample and it shows sharp peaks labelled Na, CN etc.