Semiquantitative test for iodine vapor above "complexed" iodine solutions.
A test to determine the extent to which free iodine exists in the vapor phase above the surface of "complexed iodine" solutions is described. The procedure is based on the qualitative starch-iodine test. The results can be related to the degree of complexation occurring between the polymer used in the preparation and iodine. Four products were tested: nonylphenoxypoly ethanol-iodine complex; polyvinyl pyrrolidine-iodine complex; popoxamer-iodine complex; and nonylphenoxypoly ethanol and polyvinyl pyrrolidone iodine complex. Free iodine in the vapor phase of the first product was detected in 90 minutes; the time for the other three was five days. For the tincture of iodine control, the time was 30 minutes.
D005740:Gases / Q000032:analysis; D007455:Iodine / Q000032:analysis*; D008722:Methods; D012996:Solutions; D013213:Starch
D005740:Gases; D012996:Solutions; D013213:Starch; D007455:Iodine