Setting the dosing quantity

[Roberto]

January 11 I put my ion into operation. I do one measurement a day, the values of which are pretty much okay. However, my reference solution is running low. It was written to be 5-10ml per measurement. I have run out of 1.5L in 48 days, which, if I count 10ml, is 150 days. For me, this value is 31.25ml / measurement. I calibrated the dosing pumps, stage 3. I dosed five times and divided the volume by five to make the calibration more accurate. After a month, I checked the quantity and it is accurate, so there is no problem with setting the quantity. Has anyone else experienced this type of problem? I only ask because it is very expensive to maintain in this form.
Thanks, Roberto