Methemoglobin  percent  (SI: Mass fr = 0.01 x percent)
Performed at National Institutes of Health, Bethesda MD
Effective 19Feb03 – present:
Normal   <2

Performed at Quest Diagnostics, Baltimore MD
Effective 13Nov02 – 18Feb03:
Normal   <3
Toxic     35-50
Lethal    70

Performed at American Medical Labs, Chantilly VA
Effective 20Jan99 – 12Nov02:   0 - 1.6
Hemoglobin g/dL
Male/Female 4Y-6Y    11.0 - 14.5
Male/Female 7Y-12Y  11.5 - 15
Female >= 13Y          11.5 - 15
Male:
13Y-14Y        12.0 - 15.0
15Y-19Y        12.0 - 16.8
20Y-39Y        13.0 - 17.2
40Y-49Y        12.8 - 17.2
50+ Y            12.4 - 17.2

Performed at National Institutes of Health, Bethesda MD
Effective 01Jan79 – 19Jan99:   0 - 1.9