title: Influence of the time of acidification after sample collection on the preservation of drinking water for lead determination.
mesh_terms: D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000032:analysis*; D013048:Specimen Handling; D013997:Time Factors; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D007854:Lead