if you have enough put some oil in a test tube or a shot glass and add water, the water will turn white from the peg and the thc will sink to the bottom,, its a great way to check strength peg mixes with water,,,,,,thc does not, then you can dab the white water off with a paper towel, and see whats left.its not real hard go on ebay and order " the rite stuff " or get some peg 400 USP where ever you want, and melt your shatter or flake in a shot glass mix and enjoy, it will cost you less then the co2 oil I bet, and at one gram to 5ml its way stronger then open vape oil
have fun