Table 1 Hemoglobin recovery studies from serum samples.

From: Facile synthesis of Ag@Fe3O4/ZnO nanomaterial for label-free electrochemical detection of methemoglobin in anemic patients

Sample

Added concentration (µM)

Calculated concentration (µM)

Recovery (%)

S1

35

31.1

88.8

S2

35

32.1

91.7

S3

35

33.8

96.5

S4

35

34.2

97.7

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