GrowCNanswered grow question 3 years ago If you search online you will find a few do it yourself test kits for home use.
Unfortunately I have seen no independent test results or reviews that confirm the accuracy of any home test kit. I really hope someone reading this forum works in a commercial lab and buys some home test kits to see if they are accurate. I follow the pot news in the US and Canada. Several times I have seen where the same weed was sent to several different commercial testing labs and usually at least one lab has a very different result than the others. This makes me think accurate testing is difficult.