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25615-11-6
25186-47-4
91144-23-9
Advantages of QuEChERS (“Quick
Atrazine-desethyl
EC HPLC guard column (analytical), NUCLEOSHELL PFP, 2.7 µm, 4x2 mm ICP-MS-29N-0.01X-1 25615-11-6For 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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