By the mid-1940s Rock had made several outstanding contributions to the field.
She devised many of the procedures of mixture analysis, and wrote the computing manuals used by CEC's customers, such as the Computing Manual: Analysis of Gas and Liquid Mixtures by Means of the Mass Spectrometer (1946).
Her work contributed to the creation of standards for instruments and methods in a rapidly developing field.

She also did basic analysis, with Martin Shepherd of the National Bureau of Standards, of the first Pasadena smog samples.
This research produced valuable information about the presence and types of hydrocarbons in Los Angeles air, and about the oxidization of hydrocarbons with ozone and nitrogen oxides.
By the mid-1940s Rock had made several outstanding contributions to the field. She devised many of the procedures of mixture analysis, and wrote the computing manuals used by CEC's customers, such as the Computing Manual: Analysis of Gas and Liquid Mixtures by Means of the Mass Spectrometer (1946). Her work contributed to the creation of standards for instruments and methods in a rapidly developing field.
She also did basic analysis, with Martin Shepherd of the National Bureau of Standards, of the first Pasadena smog samples. This research produced valuable information about the presence and types of hydrocarbons in Los Angeles air, and about the oxidization of hydrocarbons with ozone and nitrogen oxides.
Sibyl M. Rock