Assertion: pure chlorophyll | /r/HasProperty | a in 90% acetone
Facets:
Source sentences:
text: Following filtration, pigments were extracted by storing the filters in 90% acetone at −20°C for between 10 and 24 h. Samples were then analyzed using a Turner Design Fluorometer, pre- and post-calibrated using pure chlorophyll-a in 90% acetone as a standard.