Direct determination of lead in aerosol by slurry AAS.

• Other Authors: Ho, Kin-Fai.
• Format: Others
• Language: English; Chinese
• Published: 1999
• Subjects: Lead > Environmental aspects; Particles > Environmental aspects; Air > Pollution; Atomic absorption spectroscopy; Electrostatic atomization; Air > Pollution > China > Hong Kong
• Online Access: http://library.cuhk.edu.hk/record=b5889890; http://repository.lib.cuhk.edu.hk/en/item/cuhk-322788

Kin-Fai Ho. === Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. === Includes bibliographical references (leaves [61-66]). === Abstracts in English and Chinese. === Contents === ACKNOWLEDGMENT === ABSTRACT === Chapter CHAPTER 1 --- INTRODUCTION === Chapter 1.1 --- Air Pollution in Hong Kong === Chapter 1.2 --- Brief introduction of Particulate Matter === Chapter 1.2.1 --- Total suspended particulates === Chapter 1.2.2 --- Respirable suspended particulates === Chapter 1.2.3 --- PM2.5 === Chapter 1.3 --- Lead in Air Particulate and its Harmful Effects on Human === Chapter 1.4 --- Air Sampling === Chapter 1.5 --- Sample Treatment === Chapter 1.5.1 --- Acid digestion method === Chapter 1.5.2 --- Slurry sampling method === Chapter 1.5.3 --- Comparison between acid digestion and slurry sampling method === Chapter 1.5.4 --- Chemical modification === Chapter CHAPTER 2 --- EXPERIMENTAL === Chapter 2.1 --- Apparatus === Chapter 2.2 --- Instrumental analysis === Chapter 2.2.1 --- Electrothermal atomic absorption spectrometry === Chapter 2.2.2 --- Background correction by the Zeeman effect === Chapter 2.3 --- Reagents === Chapter 2.4 --- Procedure === Chapter 2.4.1 --- Collection of air sample === Chapter 2.4.2 --- Treatment of sample collected on filter === Chapter 2.4.2.1 --- Digestion Procedure === Chapter 2.4.2.2 --- Procedure for Slurry Preparation === Chapter 2.4.3 --- Temperature program employed === Chapter 2.4.4 --- Sample introduction === Chapter 2.4.5 --- Determination of Lead in PM 2.5 by Acid Digestion Method === Chapter 2.4.6 --- Determination of Lead in PM 2.5 by Developed Method === Chapter 2.4.7 --- Study of particle size and suspension behavior of PM 2.5 in solvent === Chapter CHAPTER 3 --- RESULTS AND DISCUSSION === Chapter 3.1 --- Choice of filter for air sampling === Chapter 3.2 --- Choice of Solvents for Suspension of Air Particulates === Chapter 3.3 --- Ultrasonic agitation === Chapter 3.4 --- Effect of the sonication time === Chapter 3.5 --- Particle size and Effect of stabilization agents === Chapter 3.6 --- Effect of acid predigestion of the slurry sample === Chapter 3.7 --- Chemical Modification === Chapter 3.7.1 --- Use palladium as chemical modifier === Chapter 3.7.2 --- Amount of chemical modifier === Chapter 3.7.3 --- Effect of nitric acid === Chapter 3.8 --- Optimization of the graphite furnace temperature === Chapter 3.9 --- Effect of using platform === Chapter 3.10 --- Sample injection volume === Chapter 3.11 --- Recovery study of Lead in PM2.5 === Chapter 3.12 --- The limit of detection and precision of the developed method === Chapter CHAPTER 4 --- CONCLUSION === APPENDIX === REFERENCES