We are using a old but still functioning Varian AAnalyst 100 with it's SpectrAA 100 Software 1.1.
It seems like the software bit hasn't change much since so I hope one of you may have an answer.
We are using the standard additions method to measure lead in a turbid water sample (~ 4mgPb/L) made to teach the students this method.
The calibration windows shows the following standards :
- Reagent Blank
- Addition 1 (2mg/L)
- Addition 2 (4 mg/L)
- Addition 3 (6 mg/L)
- Addition 4 (8 mg/L)
- Addition 5 (10 mg/L)
- Addition 0 (*****)
When the following sequence is measured the calibration curve does not appear and shows the following message "Addition zero value required"
Please note that when the addition 0 is measured at last, the absorption value is not saved in the system
We can still measure the sample value but the software will not calculate its concentration.
This is not a major issue as we ask them to make their own graphs but it is still frustrating nonetheless.