The design and calibration of the NGI is explained in three key publications and supplemented by several later publications

Key Design and Calibration Papers

  1. Marple, V. A., D. L. Roberts, F. J. Romay, N. C. Miller, K. G. Truman, M. Van Oort, B. Olsson, M. J. Holroyd, J. P. Mitchell, D. Hochrainer, “Next Generation Pharmaceutical Impactor.  Part I:  Design,” J. Aerosol Med., 16, 283-99 (2003).
  2. Marple, V. A., B. A. Olson, K. Santhanakrishnan, J. P. Mitchell, S. C. Murray, B. L. Hudson-Curtis, “Next Generation Pharmaceutical Impactor. Part II: Archival Calibration,” J. Aerosol Med., 16, 301-24 (2003).
  3. Marple, V. A., B. A. Olson, K. Santhanakrishnan, D. L. Roberts, J. P. Mitchell, B. L. Hudson-Curtis, “Next Generation Pharmaceutical Impactor: A New Impactor for Pharmaceutical Inhaler Testing.  Part III.  Extension of Archival Calibration to 15 L/min,” J. Aerosol Med., 17, 335-43 (2004).

Supplemental Publications

  1. Marple, V. A., D. L. Roberts, J. P. Mitchell, “A Proposal for the Use of the Next Generation Pharmaceutical Impactor (NGI) at Flow Rates Between 15 and 30 L/min,” Respiratory Drug Delivery IX, Palm Springs, CA, April 25-29, 2004.
  2. Roberts, D. L., J. P. Mitchell, “The Next Generation Impactor (NGI™) – Manufacturing Control: Part I. Nozzles,” Inhalation, April 2016, pages 12-19.
  3. Roberts, D. L., J. P. Mitchell, ““The Next Generation Impactor (NGI™) – Manufacturing Control: Part II.  Collection Cups and the Critical Jet-to-Plate Distance,” Inhalation, August 2016, pages 9-15.