The phrase "ascertained the type" is correct and usable in written English.
It can be used when discussing the process of determining or identifying a specific category or classification of something.
Example: "After conducting several tests, the researchers ascertained the type of bacteria present in the sample."
Alternatives: "determined the type" or "identified the type".
Infrared spectroscopy was used to ascertain the type of changes that occurred in the oil under two conditions, oxidation and evaporation.
Following some initial focus groups an extensive nation-wide postal survey was conducted to ascertain the type and degree of problems associated with automotive design for older drivers and to guide further research into the most appropriate areas.
In this study, we report the results pertaining to hydrodynamic study with a view to ascertaining the type of fluidization prevailing on the column's stage and the operating range of liquid and solid flow rates for the steady and stable operation of the column without loading or flooding with excess solid or water flow rates.
Laser Raman spectroscopy was used to ascertain the type of carbonaceous materials that were formed.
The clauses in each text were then examined to ascertain the type of structures contained within the data.
The present study aims to evaluate the rainfall magnitude for different return periods and also to ascertain the type of probability distribution that best fits the rainfall.
Solvate-I is obtained from isopropyl alchocol, acetone and water as anti-solvent is subjected to GCMS analysis to ascertain the type of solvent present in the lattice.
I use the case of Filipino skilled workers in Indian cities as the empirical basis to address the study's aims to ascertain the type of tensions in South-South relations and the emergent social mechanisms that actors use in achieving cooperation.
Prior to undertaking ANOVA, the data for each of the five dependent variables were subjected to the Anderson Darling and F test routines in Minitab 15 to ascertain the type of transformation, if any, required to meet the test assumptions of normality and equal variance among a priori groups.
