Prevalent prevalence. Scientific studies obtain PFAS while in the blood and urine of people, and researchers need to know when they induce health issues. Wouldn't you declare that "shone" is still far better. Outside of contexts like "shine sneakers" or "shine a flashlight" I'd say "shone" all the time. https://ion-chromatography-instru87665.answerblogs.com/39958482/ion-chromatography-system-an-overview