PMC:7594251 / 115455-115594 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T771","span":{"begin":0,"end":139},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"NMR is the only analytical technique that permits qualitative and quantitative analysis without previous sample purification or separation."}