Zwennis, W.C.M.

exposure level worker blood effect concentration health result value group study sample control chapter urine analysis netherland table dutch chromate method health surveillance limit determination survey figure laboratory pbb levels animal measurement monitoring quality chromium blood pressure period surveillance parameter measure pressure european community compound recovery high-dose group system pbb level environ number protoporphyrin reference health effects intake metal haemoglobin european erythrocyte zinc protoporphyrin decrease relation industry low-dose group range zielhui sampling rabbit community condition excretion increase labour breathing zone control group activity limit values high-dose relationship air sampling month variation assay screening