2mL Tube Adapters, for the Q-sep 3000 Centrifuge, 4-pk

QuEChERS SPE, Q-sep 2mL Micro-Centrifuge Tube 150mg MgSO4, 50mg C18 100/PK

Restek Combo SPE tube; 6ml; 500mg Carboprep & 90/500mg PSA polyethylene frits; for pesticide residue cleanup prep; pkg/30.

Restek Q-sep® QuEChERS dSPE 2 mL Micro-Centrifuge Tubes for dSPE (cleanup of 1 mL extract), Method: original unbuffered, mini-multiresidue, European EN 15662, Material: 150 mg MgSO4, 25 mg PSA. 100/pk

QuEChERS SPE, Q-sep Q373 15mL Centrifuge Tube, 900mg MgSO4, 150mg PSA, 150mg C18, 50-pk