{"id":"S86000502","label":"Ultratrace analysis","description":"Here are entered works on analysis of submicrogram concentrations of elements and substances. Works on the analysis of microgram concentrations of elements and substances are entered under [Trace analysis.]","source_url":"https://id.loc.gov/authorities/subjects/sh86000502","normalized_label":"ultratrace analysis","broader":["http://id.loc.gov/authorities/subjects/sh86000507"],"aliases":["Analysis, Ultratrace"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh86000502","provider":"lcsh","revision":"e2284398085e324d","taxonomy_revision":"f050b5d4780b1289","title":"Ultratrace analysis","url":"/topics/S86000502","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14413911362067645956","address_version":"morton4x16-v1","coordinates":[0,20,33037,55296],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}