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1-Dodecene
diatomaceous earth or diatomite)
Naphthalene-13C6
Endrin ketone
3'-Difluorodiphenyl ether
EC HPLC guard column (analytical), NUCLEOSIL 50-5 C18 ec, 5 µm, 4x3 mm 44513-CA 1-DodeceneFor protection of your main HPLC column from contamination, it is recommended to use guard columns. These short columns are placed into a guard column holder. The guard column holder in combination with a guard column inside is installed between the injector and the HPLC column. This installation prevents chemical impurities to reach the main column. Because a contamination could form an irreversible bond with the column packing material (stationary
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