Trace Elements Determination

Question 1

ICP-MS

Answer 1

inductively coupled plasma mass spec

Question 2

sample introduction system of ICP-MS

Answer 2

composed of nebulizer andsoray chamber and provide means of getting smaple into instrument

small droplets enter torch while discarding large droplets

Question 3

ICP torch and RF coil

Answer 3

• generates argon plasma, serves as ion source of ICP-MS
• plasma temp of 6000C; temp at surface of sun
• voyage into plasma = liquid droplets contain sample matrix and elements to be determined are dried to a solid and heated to a gas
• atoms continue travel to plasma; they absorb more energy and eventually release one e- to form single charged ions

Question 4

interface of ICP-MS

Answer 4

linksatmospheric pressure ICP ion source to high vacuum mass soec

Question 5

vacuum system of ICP-MS

Answer 5

provides vacuum for ion optics, quadrupole and detector

Question 6

ion optics of ICP-MS

Answer 6

guides desired ions into quadrupole while assuring neutral species and photons are discarded from ion beam

Question 7

mass spec of ICP-MS

Answer 7

quadrupole
acts as a mass filter to sort ions by their m/z

Question 8

detector of ICP-MS

Answer 8

electron mult
counts indiv ions exiting quadrupole

Question 9

data system of ICP-MS

Answer 9

controls all aspects of instrument control and data handling to obtain final concentration results

Question 10

T or F. Atomic absorption is a mass spec method

Answer 10

F! It is a photometric method

Question 11

analytical method for determining conctn of metal and semi-metallic elements in various matrices

Answer 11

atomic absorption

Question 12

absorption bands really narrow

Answer 12

line spectrums

Question 13

cuvette in atomic absorption

Answer 13

flame