GC/MS question for any chemists out there.

There is a gas chromatograph/mass spectrometer at my work that we use for testing cannabinoid levels in meds but I want to use it to test soil for nutrient levels to aid with deficiency identification. I was wondering if any of you chemists would know or could point me in the right direction for a procedure for this kind of test?

just go to ur garden store and get u a 3 i one reader light/PH/moister its only like $10 and well worth it

Um, I think he wants to do some serious testing, not the kmart version.

I have a ph meter already. Im talking about finding out the exeact percentage of NPK and the other trace elements in a soil. To do that I need to prep a solution that I can inject into the machine but I dont know where to look for the procedure.