Ahlstrom Grade 631 Qualitative Filter Paper
Alstrom Grade 631 Medium Speed Qualitative Filter Paper. Grade 631, 0.24mm - 150 mm/30 min. This slightly thicker grade provides a faster flow rate than Ahlstrom 601 (F1279). Recommended for routine chromatography when loading is relatively low. Also suitable for routine quality control applications where high levels of resolution are not required and speed is important.