PMC:7152911 / 76702-76900 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T624","span":{"begin":19,"end":43},"obj":"Sentence"},{"id":"T625","span":{"begin":44,"end":76},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" sample handling.\n\n3.1 Sample preparation: Filtration and pre-concentration\nSample preparation steps have various purposes, including concentrating or amplifying the target species through separati"}