Assertion: tube | /r/MadeOf | potassium oxalate
Facets:
value: as a preservative
type: PURPOSE
value: as an anticoagulant and sodium fluoride
type: MANNER
Source sentences:
text: This tube contains potassium oxalate as an anticoagulant and sodium fluoride as a preservative – used to preserve glucose in whole blood and for some special chemistry tests.