WebApr 13, 2024 · 1 INTRODUCTION. Propolis is a natural resinous substance collected by bees from the buds and exudates of various trees and plants, mixed with beeswax and salivary enzymes. 1 It is used by bees to protect the entrance from intruders, plug holes, smooth internal walls, mummify dead animals (small insects) inside the hive, and … WebCHROMABOND® glass columns. Glass columns with chemically very inert glass fiber filter elements (nominal pore size 1 µm) Two different sizes: 3 and 6 mL; Available with all …
SPE Columns - Fisher Sci
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CHROMABOND® SiOH Lab Unlimited
WebCHROMABOND® Florisil® MACHEREY-NAGEL Magnesium silicate for SPE Features Matrix magnesium silicate (MgO – SiOH 15:85), high purity, particle size 150–250 µm Recommended application: organic tin compounds, aliphatic carboxylic acids, PCBs, PAHs Compare this item CHROMABOND® HR-XCW MACHEREY-NAGEL WebCHROMABOND® Alox A MACHEREY-NAGEL …e.g., silica gel based: unmodified, C8, C18, NH2, CN; Polyermic material: HR-X, HLB, PA; mixed-mode, special combinations, aluminum oxide, kieselguhr (XTR) etc. NP, RP, ion exchanger and for special applications Different column / cartridge sizes available, e.g. 1, 3, 6, 15, up to 150… Compare this item WebCHROMABOND® SiOH is an unmodified silica phase for SPE. Weakly acidic silica material. Very polar phase. Strong interaction with polar compounds. Recommended for polar … trn ba5 aliexpress