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24894-78-8
Nb ICP-OES 260
tetrachloroethene (81)
Claritas PPT® Grade ICP-MS Instrument Check Standard 1
POLYGOSIL 60-10
EC HPLC guard column (analytical), NUCLEOSHELL RP 18plus, 2.7 µm, 4x3 mm 10006-1-500 24894-78-8For 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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