Although no studies link short-term PAH exposure to long-term exposure, there are examples of other lipophilic chemicals, such as phthalates, for which a single urine sample may represent exposure over the previous 3 months (Hauser et al. 2004).
The phthalate metabolites for which urinary concentration data are available since 1999 are monoethyl phthalate (MEP), MBP, mono cyclohexyl phthalate (MCHP), mono 2-ethylhexyl) phthalate, mono 2-ethylhexylhalate (MOphthalateenzyl phthalate, and monoisononyl phthalate (MNP).
We observed a similar age pattern for monoethyl phthalate (Silva et al. 2004), a metabolite of diethyl phthalate (DEP) for which a primary source of exposure may be the routine use of personal care products (Duty et al. 2005).
Further, because only some brands with a given active ingredient might contain phthalates, we selected medications for which phthalate-containing brand(s) were likely to account for a high proportion of use for the specific active ingredient.
Multilinear regression analysis is applied to the analysis of emf data of the silver silver chloride electrode in the temperature range 298 498 K and hence to the analysis of emf data for potassium hydrogen phthalate from which the standard pH values are evaluated over the same temperature range consistent with previously reported values for 298 368 K.
Given the limited data available in NHANES, we had to restrict the scope of the analysis to phthalate-containing prescription medications for which we were able to identify users in the study population.
The imprint factors of the sorbents ranged from 1.8 to 3.0 for eight of the phthalate esters except for Diamyl phthalate, which indicated that the DMIPs sorbents have high selectivity.
The lessons can also provide guidance for regulating EDSs as phthalates, atrazine, and bisphenol A, for which the luxury of hindsight is not yet available.
Pesticides, phthalates, and cotinine contained biomarkers for which all GMRs significantly different from one were also >1, indicating potential EJ concern.
Among the EDCs in the present study, phthalates are the only chemical group for which there is supporting evidence of health effects from human studies.
