Baking Soda Gender Test

Nan
Have any of you girls ever heard of the baking soda gender reveal test? 
Today my coworker was talking to be about it.. 
You get 2 table spoons of baking soda and put it in a clear container.. Then you pour you pee in . (Just enough to cover the baking soda) 
If it frizzles it's a boy and if it just stays flats it's a girl.. You are not supposed to shake it.. 
Have any of you tried it?