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Under accelerated pH 10.4, 40°C stability test, COSMOCORE C18 column shows superior stability compared with other core shell C18 phases.

pH stability

pH stability

Test condition
Column size: 2.1 mm I.D. x 100 mm
Mobile phase: 0.35% ammonium hydroxide/ acetonitrile = 90/10 (pH 10.4)
Flow rate 0.4 ml/min.
Temperature: 40 °C
Sample caffeine 0.05 mg/ml  
Inj.Vol. 1 µl

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