[Association of child blood lead and its chemical form in the room dust].
OBJECTIVE
Studies on the association of child blood lead and the chemical form of the room dust lead as well as to explore its removability and the biological validity.


METHODS
Using minute step extraction process to analyze and test the seven chemical forms of lead in the dust of a room. Blood lead count and humus union condition, carbonate union condition exposition quantity, amount of radiation, output quantity from environmental to blood lead etc. were calculated.


RESULTS
The child blood lead was related to the various chemical form but carbonate condition (r = 0.531, P < 0.01) and humus (r = 0.361, P < 0.05) showing statistical significance and also related to the exposure of carbonate condition (carbonate: r = 0.837, P < 0.01). The output quantity (carbonate pH = 3.5: r = 0.837, P < 0.01) of simulate gastric juice was related to the exposure to humus (r = 0.746, P < 0.05), intake (r = 0.746, P < 0.05) and the output quantity of carbonate condition simulate gastric juice (pH = 1.5: r = 0.745, P < 0.05).


CONCLUSIONS
In South China, areas with high carbonate content lead and the union conditions of carbonate and humus were possibly the main reasons causing excessive amount of child blood lead level.
Bian
Gui-guo
GG
Environmental Protection Bureau, Fuzhou 350003, China.
D000293:Adolescent; D016902:Air Pollution, Indoor / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D004391:Dust / Q000032:analysis*; D004781:Environmental Exposure; D004784:Environmental Monitoring / Q000379:methods; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007854:Lead / Q000097:blood* / Q000737:chemistry*; D008297:Male
D004391:Dust; D007854:Lead