{HEAD ~ A method} for determining {TAIL ~ the hemoglobin content} of blood, which comprises contacting a test device with a sample of blood and measuring light at a wavelength of between about 300 and about 620 nanometers which is reflected from said test device, wherein said test device comprises a substantially opaque, light reflective, blood absorbent matrix having a refractive index of less than about 1.0 or above about 1.7 
for determining
{ HEAD ~ A method } for determining { TAIL ~ the hemoglobin content } of blood , which comprises contacting a test device with a sample of blood and measuring light at a wavelength of between about 300 and about 620 nanometers which is reflected from said test device , wherein said test device comprises a substantially opaque , light reflective , blood absorbent matrix having a refractive index of less than about 1.0 or above about 1.7
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH