Chemical detection methods

Question 1

random sampling

Answer 1

taking samples from points entirely at random.

Question 2

taking samples from points entirely at random.

Answer 2

random sampling

Question 3

Systematic sampling

Answer 3

taking samples across a grid or other pattern to get an idea of the entire area

Question 4

taking samples across a grid or other pattern to get an idea of the entire area

Answer 4

Systematic sampling

Question 5

Titration

Answer 5

adding another chemical into your sample sloky t determine how much analyte is present, takes a long time but fairly accurate.

Question 6

adding another chemical into your sample sloky t determine how much analyte is present, takes a long time but fairly accurate.

Answer 6

Titration

Question 7

spectrophotometry

Answer 7

analyzing chemical presence using spectral lines, the higher the absorbtion, the more is present.

Question 8

analyzing chemical presence using spectral lines, the higher the absorbtion, the more is present.

Answer 8

spectrophotometry

Question 9

Chromatography

Answer 9

passing a mobile phase over a stationary phase, analytes will partialy stick to the stationary phase and you can mesure how long it takes in order to identify chemicals.

Question 10

passing a mobile phase over a stationary phase, analytes will partialy stick to the stationary phase and you can mesure how long it takes in order to identify chemicals.

Answer 10

Chromatography

Question 11

gass chromatography

Answer 11

a method where the stationary phase is a long glass tube with many twists, and the mobile phase is a gass.

Question 12

a method where the stationary phase is a long glass tube with many twists, and the mobile phase is a gass.

Answer 12

gass chromatography

Question 13

blanks

Answer 13

running a test where you know there is no analyte to see what kind of results it gives.

Question 14

running a test where you know there is no analyte to see what kind of results it gives.

Answer 14

blanks

Question 15

calibration

Answer 15

doing multiple tests with known amounts of analyte to see how it behaves

Question 16

doing multiple tests with known amounts of analyte to see how it behaves

Answer 16

calibration

Question 17

spiking

Answer 17

adding a known amount of analyte to the unknown and seeing how that changes the signal

Question 18

adding a known amount of analyte to the unknown and seeing how that changes the signal

Answer 18

spiking

Question 19

LOQ

Answer 19

Limit of Quantification, the lowest signal where the amount can be determined

Question 20

Limit of Quantification, the lowest signal where the amount can be determined

Answer 20

LOQ

Question 21

LOD

Answer 21

limit of detection, the lowest signal where we can say the analyte is present

Question 22

limit of detection, the lowest signal where we can say the analyte is present

Answer 22

LOD

Question 23

gas chromatography invented in…

Answer 23

1952, GCMS follwed in 1970

Question 24

TCD invented in ….

Answer 24

1957