I had to measure sodium and sulfur in smbs today.
At a dilution of 1:10,000, I had the correct reading of about 24% for sodium, but sulfur was incredibly high!
Theoretically, I would have found 500 % sulfur.
I measure sulfur at 181.972 nm radial and calibrate at 10 and 100 mg/l.
The calibration looks really fine. The "boost" rinse is on.
Does anyone have an explanation for this?
Could it have to do with the composition of the smbs?
Thanks for help, Gaby