Which is correct? Random errors affect accuracy and systematic errors affect precision. An accurate result shows agreement with the true or accepted value. Precise results can contain significant random error, but little systematic error. The standard deviation is a good measure of accuracy.
Which is correct?
|
Random errors affect accuracy and systematic errors affect precision. |
||
|
An accurate result shows agreement with the true or accepted value. |
||
|
Precise results can contain significant random error, but little systematic error. |
||
|
The standard deviation is a good measure of accuracy. |
Polydimethylsiloxane (PDMS) stationary phases have low polarities. Which of the following statements is TRUE about gas chromatography using PDMS stationary phases?
|
The gas chromatography column is typically packed with silica microparticles. |
||
|
An oven is used to control the column temperature because a constant temperature is always needed in gas chromatography |
||
|
Octane (C8H18, boiling point: 126 ºC) is eluted later than dodecane (C12H26, boiling point: 216 ºC) |
||
|
3-Pentanone ((C2H5)2CO, boiling point: 102 ºC) is eluted later than propanol (CH3CH2CH2OH, boiling point: 97 ºC) |
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
