B&M Sudan red(Tony Red) testing special column adopts a strong polar adsorbent filler. In high pH conditions, it is more stable than the unbonded silicone gel. Finer particles ensure better extraction efficiency, which has an electrically neutral surface and is biased towards preserving rich electronic compounds such as aromatic and fatty amines. At the same time, there is also the ability to retain compounds containing electronegative groups such as oxygen-containing, phosphorous and sulfur atoms.

The product can be used for extraction separation of polar or non-polar substances in water-soluble and non-aqueous samples.

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