Usage of syringe filter

1. Before inhaling the sample, draw about 1ml of air into the syringe to minimize liquid residue

2. Inhale the sample into the syringe, invert the syringe and clean all residues on the top

3. Connect the needle filter to the syringe and tighten it gently to ensure good sealing

4. Filter the sample in the syringe and inject it into the sample bottle, and then increase the recovery rate to the greatest extent according to the steps

Remove the filter, draw air into the syringe, reconnect the filter head, and push out all residual samples