11. Measurement and Data processing (practical stuff) Flashcards
1
Q
What are 2 methods to measure the concentration of metal cations in a solution? Which is faster?
A
UV absorbance and complexometric titration
Absorbance is faster
2
Q
What type of error is it when the calibration curve (absorbance against concentration) doesn’t start from the origin?
A
Systematic error. When absorbance = 0, concentration supposed to = 0
3
Q
How to find uncertainty of gradient in calibration curve?
A
NOT SURE, PLEASE CLARIFY
Use difference between maximum and minimum slope
4
Q
What do you have to do before you use the UV spectrometer to check the absorbance of a substance?
A
Do a survey scan. Check that the maximum lambda is the same as the literature value that you found.
