Chapter 9
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第九章 Chapter 9 PowerPoint PPT Presentation


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第九章 Chapter 9. 原子吸收光譜法與原子螢光光譜法 Atomic Absorption and Atomic Fluorescence Spectrometry. 9A 樣品原子化技術 Sample atomization techniques. 將先探討在原子吸收光譜法與原子螢光光譜法中,兩種最常用之樣品原子化方法: 火焰原子化法 與 電熱式原子化法 進行。 接著再探討也被使用於這兩種光譜法中的較特別之其他三種子化方法。. 9A-1 火焰原子化法 Flame atomization.

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第九章 Chapter 9

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Chapter 9

Atomic Absorption and Atomic

Fluorescence Spectrometry


9A Sample atomization techniques


9A-1 Flame atomization

  • (nebulized)

  • (desolvation)

9-1


9-1


  • 17002400

  • 25003100

9A-1


9-1


  • (flashback)

9A-1


  • C2CH

  • //

9-2

9A-1


9-2


  • 2.5 cm

9-3

9A-1


9-3


9-4

9A-1


  • AAS

9-5

9A-1


9-5


9A-1


    • (~ 10-4 s)

9A-1


9A-2 Electrothermal atomization

  • 20003000


  • Lvov

  • 9-6c

9-6

9A-2


9A-2


  • ( < 1 s)

9-7

9A-2


9-7


  • 0.510 mL

  • 10-1010-13 g

  • 5 %10 %1 %

9A-2


9A-2


9A-3 Specialized atomization techniques

9-8


9-8


9-9

9A-3


9-9


9B Atomic absorption instrumentation

  • AAS

  • AAS


9B-1 Radiation sources

  • (0.0020.005 nm)

  • (R > 105)


9B-1


  • 9-10a

  • 9-10bl1l2log(P0/P)

  • 9-10cP0P

  • ()

9-10

9B-1


9-10


  • (sputtering)

9-11

9B-1


9-11


  • (self absorption)

  • AFS

9B-1


  • (EDLs)

  • EDLs

  • EDLs

  • SeAsCdSbEDLs

9-12 EDLs

9B-1


9-12 EDLs


9B-1


9B-2 Spectrophotometers

  • /1


9-13

9B-2


9-13


  • 100

9B-2


9C Interferences in atomic absorption spectroscopy


9C-1 Spectral interferences

  • 0.1


  • CaOH

  • CaOH

  • TiZrW

9C-1


  • /

9C-1


9C-1


  • 350 nm

9-14

9C-1


9-14


  • (~ 10 kG)

  • 0.01 nm

  • (Zeeman effect)

  • ss

9C-1


  • s90

9-15

9C-1


9-15


  • (A > l)

9C-1


9-16

9C-1


9-16


9C-2 Chemical interference

    • /


  • (releasing agent)

  • EDTA8-APCD1-

  • EDTA

  • 8-

9C-2


  • MOH

9C-2


    • HCl

    • Ox

9C-2


  • MM+

  • K

  • MP

9C-2


9C-2


9-2


  • MBBMB

  • B

9C-2


  • (ionization suppressor)

9-17

9C-2


9-17


9D Atomic absorption analytical techniques

  • 9D-1 Sample preparation


    • ()


9D-2 Sample introduction by flow injection

  • (FIA)

  • FIA

  • FIA


9D-3 Organic solvents

  • /

  • ()8-


9D-4 Calibration curves


9D-5 Standard addition method

9D-6 AASApplication of atomic absorption Spectrometry

  • 60AAS

  • 200 nm


9D-6


9-3(ng/mL)


  • 120 ng/mL0.0010.020 ppm

  • 0.0020.01 ng/mL2 x 10-61 x 10-5ppm

  • 1 %2 %

  • 510

9D-6


9E Atomic fluorescence spectroscopy

  • PbHgCdZnAsSbBiGeSe


9E-1 Instrumentation


  • (EDLs)

  • (EDLs)

9E-1


  • ()

  • (EDLs)

  • 320 nm

  • 320 nm

9E-1


9E-2 9E-3 Interferences and applications


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