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86 USP 791 CALIBRATION STD 1L
18α(H)-30-Norneohopane
Active ingredients from strongly matrix contaminated
Clear glass
040 inch (1 mm)Valve Outer Body Dimension: 1 inch (25
EC HPLC guard column (analytical), NUCLEODUR 100-3 C8 ec, 3 µm, 4x2 mm Method - Nitrate - Modified Griess reaction 86 USP 791 CALIBRATION STDFor 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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