Allergological and Toxicological Aspects in a Multiple Chemical Sensitivity Cohort

Table 7

Recommended threshold levels in matrices for biological monitoring of total mercury in humans after complete mercury dental amalgam removal. Very low level of mercury in bioindicators are able to reverse clinical manifestations as well as abnormal laboratory values associated with mercury amalgam exposure.

Mercury levels	Threshold limit values	Unit of measurements
Total Hg in scalp hair	≤0.5	micrograms/g
Total Hg in whole blood	<1.5	micrograms/L
Total Hg in serum	<1.5	micrograms/L
Total Hg in plasma	<1.5	micrograms/L
Total Hg in urine	≤1.0	micrograms/L
Total Hg in saliva	≤0.5	micrograms/L
Total Hg in breast milk	≤0.5	micrograms/L
Total Hg in nails	≤0.5	micrograms/g
Total Hg in intraoral cavity	≤1.5	micrograms/m^3