BEST ANSWER:I buy my chromatography chemicals every fall prior to harvest. They easily last and function through the end of MLF. Ypu should buy new chemicals every year, though I have found the chromatography paper to last a long time if stored properly. Hope this helps, Mike
BEST ANSWER:I buy my chromatography chemicals every fall prior to harvest. They easily last and function through the end of MLF. Ypu should buy new chemicals every year, though I have found the chromatography paper to last a long time if stored properly. Hope this helps, Mike