ISMAS International Symposium on Mass Spectrometry is held triennially. This provides a forum to research scholars, university faculty and research scientists from Research Institutes, Universities, Industries, Hospitals and other organisations to discuss their experiences and new developments in mass spectrometry. The Symposium is organized by ISMAS and cosponsored by a number of Departments of Government of India, other scientific organisations and Industries. Till date, Ten Symposia have been organized.

March 20 to 22, 1978, Seminar on Mass Spectrometry - "Applications and Current Trends", BARC, Bombay.

December 21 to 23, 1981, National Symposium on Mass Spectrometry - "Progress in Research, Applications and Instrumentation", BARC, Bombay.

September 22 to 24, 1985,Third National Symposium on Mass Spectrometry, RRL, Hyderabad.

January 4 to 6, 1988, Fourth National Symposium on Mass Spectrometry, IISc, Bangalore.

January 7 to 9, 1991, Fifth National Symposium on Mass Spectrometry, PRL, Ahmedabad.

October 11 to 13, 1993, Sixth National Symposium on Mass Spectrometry, IIP, Dehradun.

November 26 to 28, 1996, Seventh National Symposium on Mass Spectrometry, DRDE, Gwalior.

December 7 to 9, 1999, Eighth ISMAS Symposium on Mass Spectrometry, IICT, Hyderabad.

January 27 to 31, 2003, ISMAS Silver Jubilee Symposium on Mass Spectrometry,[ISMAS-SJS-2003], NIO, Goa.

January 28 to February 1, 2006, 10th ISMAS Triennial International Symposium on Mass Spectrometry, Tea County Resort, Munnar.

These triennial Symposia on Mass Spectrometry have acquired International recognition in view of the participation of distinguished Mass Spectrometrists who are invited from different reputed Mass Spectrometric laboratories of the world. In view of the reputation of the ISMAS Symposia, young Mass Spectrometrists working abroad also participate by sending their contributed papers.

The manuscripts of the Invited Talks and the Contributed Papers of the Symposium are edited and brought out in the form of a book prior to the Symposium and are distributed to all the delegates at the time of Registration.

At each Triennial Symposium, ISMAS identifies the best paper in each area of mass spectrometry and gives cash award and "Certificate of Merit" to the best paper in each category.

ISMAS Symposium has been renamed as 'ISMAS Triennial International Symposium on Mass Spectrometry' with effect from April 2005.