Assertion: phosphate's density | /r/HasProperty | measured at 562 nm
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Source sentences:
text: An aliquot of the resulting solution was transferred to a 96-well flat-bottomed tray and the optical density was measured at 562 nm (the absorption peak of the formazan) with a microplate reader (MR 5000, Dynatech Laboratories, Embrach-Embraport, Switzerland).