Long-term stability of folate in dried blood spots stored in several conditions.

Zimmerman, Rheanne K; Slater, Megan E; Langer, Erica K; Ross, Julie A; Spector, Logan G · J Pediatr · 2013

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Abstract

We examined stability of folate in 50 subjects’ dried cord blood spots stored for 9 months at −80 °C, 4 °C, ambient and humid conditions. Mean folate declined progressively, but most subjects were +/− 3 ranks of their −80 °C position. Meaningful information about relative concentrations was retained across conditions.

Medical subject headings