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(Atomic Emission Spectrometry,AES)

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Atomic Emission Spectrometry AES 6.1 6.2 AES 6.3 – PowerPoint PPT presentation

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Title: (Atomic Emission Spectrometry,AES)


1
??? ??????? (Atomic Emission Spectrometry,AES)
6.1 ???? 6.2
AES ?? 6.3 ????????? 6.4 ??

2
??? ???????(Atomic Emission Spectrometry,AES)
  • ???
    1)????????????
  • 2)???????????????????(???)
  • 3)?????????????????

3
??? ???????(Atomic Emission Spectrometry,AES)
??AES?????????????????,??????????????????????????

4
(No Transcript)
5
6 . 1 ????
?? ????? 1.??????? 1)??(?????)
???? 2)????(outer electron) (???E1
???E2) 3)????(???E2 ???E1)
4)??????(?)??? ?E E2-E1 h? hc/?
6
2.????
  • ????(Excited potential)????--?????????,?eV???????
    ????????
  • ??????????????????,?I??,
  • ?Na(I)
  • ???(Resonance line)???????(Ground
    state)??????????????(????)???????????????
  • ????(Ionization potential)?????????????????????
    ??????????????????????????II,III,IV????

7
2.????
  • ???????,?????????????????,??????????????,?????????
    ????????Mg ?285.21nm????,Mg?280.27nm?????????

8
?? AES ????
????????????????????????(????) ??????????????????
???????,???????????????????????????,??????????????
??????????
9
?? AES????
1. Boltzmann???????
 
AES???????????????????????,???????????????????????

10
1. Boltzmann???????
? Plasm(????) ??????????,???????? N0
????????? Ni ???? Boltzmann ?? ??,g
?????(2J1)k?Boltzmann??(1.38?10-23J/oC)
11
1. Boltzmann???????
  • ??? i, j ???????????? I ????? A ?????????? Ni
    ???,?
  • ???????????,??????? N0 ?????????? N?,???? c
    ??N?
  • ???,I ? c,?????????????

12
1. Boltzmann???????
  • ????,???????????? b
  • I acb(Schiebe-Lomarkin??)
  • ???,????
  • logI blogc loga
  • ??? AES ???????????

13
2. ?????? I ??
  • ???? g (weight)
  • ????(probability)
  • ?????????E
  • ?????(self-absorption)???(self-reversal)
  • e) ???? T
  • f) ????? N0 ??? c
  • ????????????????,?????????????????
  • ?????????????????????T!

14
6.2 AES??
AES???????????????????????????????????????
15
? ?AES??
  • ????? ???????????????????????????????????????????
    ?????????????
  • ????????????????????????????????(ICP)?

16
? ?AES??
1. ???????
17
(1)????????(ICP)
  • ???? ?????????????????,????????0.1?????,????????
    ???????,???????????????,???????
  • ??,?????,???????????????????????????

18
(1)????????
????
??ICP ????? ????? ???(??????) ?????????
?????,????? ?????,?? ICP (?????) ????,????(??
Ar ???????????????????)
???
???
??Ar ??
??(Ar)
??
????
19
ICP?????
1)Tesla ?? ??????(27-41KHZ, 2-4KW)
?????? 2)?? ?? ????
???? ??? ? ????
????? 3)?????????(???,Eddy current) ?
??? ?10000K ???? ????Ar
?????????? ????????????
20
(No Transcript)
21
?????????????
  • ???????????????
  • ??????????????????,???????????????????????????????
    ,????????????????,?????????????,???????????????,??
    ??????????????????????????????????????????????????
    ???????????,?????????,????????????????????

22
ICP????
1)???????????? 2)??,??? 3)?????(matrix
effect) ?????ICP??? 4)???????????,?????? 5)?????
6)??????? 7)?????????????(70??) ????????????
??????????
23
(2)????
????,????????
???????(4000 K) ???????40007000K
24
(2)????
  • ??????
  • a)???????(???)---?????????---??????---???????????
    ???????????????????????
  • b)????----??????
  • c)???,????
  • d)?????

25
(3)??????
26
????????
1)?????????????????????? 2)????,????,???????????
? 3)??????,?????? 4)????????,????????????,??????
??????????????
27
(4)????
28
(4)????
  • ????
  • 1)????,??????
  • 2)?????,????(????)?,????,??????????????????????
  • 3)?????(????10000K)??????????

29
2. ???????
a)??????????????? b)????????????? c)????
d)???????????????????(??)
?? ????/K ????/K ????? ??
?? ? 10005000 ?
???? 8003800 40007000 ?? ??
???? ?????? ??????? ??
?? ?????? 10000 ?
ICP ?? 60008000 ??
30
??????(?) ??????
?????????? ???????? I??????,? logI blogc
loga ??????? I?
31
??????
  • ????
  • ???????????????

32
???????
  • ??????????(???)
  • ??????????

33
????????
34
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35
??????????
  • ? ?????
  • ? ???????
  • ? ????
  • ?????,??????
  • ? Slit ??,??????
  • ? ?????

36
2. ???
????????????????????? ??????????????,?????????????
?????????????????????
37
2. ???
  • ??????????????,???????????????,????????????,??????
    ,??????????????
  • ?????????????????,?????????????
  • ?????????????,?????????

38
?????
39
2. ???
40
(No Transcript)
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