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AS 2134.3-1994
[Current]Recommended practice for chemical analysis by atomic absorption spectrometry, Part 3: Vapour generation atomic absorption spectrometry
Specifies instrumentation, operating procedures and safety precautions for chemical analysis by vapour generation atomic absorption spectrometry. Elements covered by the recommended procedures are mercury, antimony, arsenic, bismuth, germanium, lead, selenium, tellurium and tin.
Published: 16/05/1994
Pages: 20
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 PRINCIPLE
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
2 INSTRUMENTATION
2.1 GENERAL
2.2 SOURCES OF RADIATION
2.2.1 Line sources—Hollow-cathode lamp
2.2.1.1 Principle of operation
2.2.1.2 Operating current
2.2.1.3 Intensity and stability
2.2.2 Line sources—mercury vapour lamps
2.2.3 Line sources—other lamps
2.2.4 Continuum sources
2.3 VAPOUR GENERATION SYSTEM
2.3.1 General
2.3.2 Direct-transfer systems
2.3.3 Collector systems
2.4 ATOMIZATION SYSTEM
2.4.1 General
2.4.2 Types of atomizer
2.4.2.1 Heated silica tubes
2.4.2.2 Hydrogen diffusion flames
2.4.2.3 Graphite furnaces
2.5 SAFETY PRECAUTIONS
2.5.1 Hazards requiring precautions
2.5.2 Fume hoods
2.5.3 Compressed gases
2.6 MONOCHROMATOR
2.6.1 Resolution
2.6.2 Wavelength stability
2.6.3 Slit width
2.6.4 Optical system
2.7 MEASUREMENT SYSTEM
2.7.1 General
2.7.2 Operation
2.7.3 Background correction
2.7.4 Readability
3 SYSTEM OPERATION
3.1 GENERAL
3.2 FACTORS AFFECTING VAPOUR GENERATION
3.2.1 Liquid phase interferences
3.2.2 Inter-element effects
3.2.3 Reaction media
3.2.4 Temperature
3.3 FACTORS AFFECTING VAPOUR TRANSPORT
3.4 FACTORS AFFECTING ATOMIZATION AND MEASUREMENT
3.4.1 Method of atomization
3.4.2 Heated silica tubes
3.4.3 Hydrogen diffusion flames
3.4.4 Graphite furnaces
3.4.5 Mercury
3.4.6 Spectral interference
3.5 ELEMENT OPTIMIZATION
3.5.1 General
3.5.2 Factors for optimum sensitivity
3.6 SENSITIVITY
3.7 PRECISION
3.8 SETTING-UP PROCEDURE
4 CALIBRATION AND ANALYSIS
4.1 CONTAMINATION AND REAGENT PURITY
4.2 CONTAINERS
4.3 REFERENCE MATERIALS
4.4 CALIBRATION AND TEST SOLUTIONS
4.4.1 Calibration solutions
4.4.2 Test solution
4.4.3 Blank test solution
4.4.4 Concentrations of calibration and test solutions
4.5 CALIBRATION GRAPHS
4.6 CALIBRATION AND TEST PROCEDURE
4.6.1 Absorbance measurements
4.6.2 Treatment for blank readings
4.6.3 Direct instrumental measurement
4.6.4 Analyte addition technique
4.7 ACCEPTANCE OF RESULTS
4.7.1 General
4.7.2 Acceptance criteria
4.7.2.1 Single test sample
4.7.2.2 Replicate determinations
4.7.2.3 Acceptance of reference material results
APPENDIX A
Cited references in this standard
[Withdrawn]
Chemical analysis — Interlaboratory test programs — For determining precision of analytical method(s) — Guide to the planning and conduct
[Current]
Recommended practice for chemical analysis by atomic absorption spectrometry, Part 2: Graphite furnace spectrometry
Content history
DR 93118
AS 2134.3-1994 Rec:2016
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