Fig 1.
System representation for measuring non-condensable gases (NCG) used in the tests, adapted from EN285:2015, where: a) before the collection, b) after the measurement according to the norm.
Table 1.
Treatment steps and parameters of purified water and purified water for injection or water for injection considering pharmaceutical compendiums [23–26].
Table 2.
Non-condensable gases concentration tests performed, approved, or failed tests (%) based on the type of water used for steam generation, from September/16 to August/21.
Fig 2.
Interval plot of NCGs concentration versus types of water used for steam generation.
Table 3.
Descriptive statistics (mean, standard deviation, and 95% confidence intervals) for each separate water type group analyzed (softened, reverse osmosis, purified, and WFI).
Fig 3.
Box-plot of distributions of NCGs concentration comparing tests performed with reverse osmosis water (RO) and water for injection.
Fig 4.
Histogram for NCGs concentration (Ho and 95% CI) for processes using WFI for steam generation.
Table 4.
Descriptive statistics (n, mean, standard deviation, and 95% confidence intervals) of process systems with a concentration of NCGs below 3.5%.