S. S. . Hang Ho, “Measurement of Airborne Carbonyls with Pentafluorophenyl Hydrazine (PFPH)-Coated Tenax Tube using an Integrated Automatic Sampler in a Rapid Developing City in Pearl River Delta (PRD) Region, China”, J. Environ. Sci. Eng. Technol., vol. 7, pp. 26–34, Mar. 2019.