exam 1 Flashcards
(7 cards)
1
Q
data set defined by
A
average st dev, # measurements
2
Q
systematic error vs random
A
systematic: system (instrument)
random (personal)
3
Q
how can sensitivity be determined from curve
A
slope
4
Q
concentration lod
A
3(sx)/m
3(noise)/sensitivity
lowest concentration of analyte that instrument can measure
5
Q
constant mass
A
weighing device has reached a mass at room temp & when weighed repeatedly has uncertainty within random error of balance
6
Q
ways to decrease uncertainty
A
increase n
reduce systematic error
7
Q
two sources of systematic error that would influence measured mass
(one to lower mass, one to increase mass)
A
- precipitation with interference would increase the mass
- sample loss during transfer would decrease the mass
