Pre-weighed extraction sorbents for fast, simple sample prep for multiresidue pesticide analysis in a variety of sample matrices. Supports European (EN 15662) method. Contains 4g MgSO4, 1g NaCl, 1g TSCD (trisodium citrate dihydrate), and 0.5g DHS (disodium hydrogen citrate sesquihydrate) in each slim, easy-open packet which fits perfectly into 50mL centrifuge tubes to prevent spills. Use 50 mL centrifuge tubes REST-25846 (50/pk) or EPPE-0030122179 for sample extraction. Replacement for REST-26236.