Hi!

I just started using a brand new HPX-87H column to analyze organic acids using HPLC.

I've only used C18 columns before and the washing process took only 90min.

But now this HPX-87H, according to the manual, takes 4+12 hours for the washing (cleaning) process after the sample measurements.

Is it correct? Do I really need a day to wash this column? What's the point of washing this long?

Would it be bad if I just use the mobile phase (~0.005M H2SO4) for 90ish min to clean the column?

What's the point of the small amount of ACN in the cleaning solution?

Any comments about this column will be much appreciated!

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