PrepAid Propylene Glycol - (C3H8O2) (1224F31): Liquid grinding aid, 25 grams (approximately 24 mL) in dropper bottle. Instructions included. PrepAid Cellulose Binder - (C6H10O5)n (1224F32, F33): = 20 µm powder, 150 g bottle. Can be blended with sample at 10% by weight to form XRF sample disk,...