| http://www.w3.org/ns/prov#value | - For example, biological samples, such as stool, blood, urine, saliva, or swab specimens of the cervix, urethra, nostril, or throat, as well as environmental samples, such as food product samples, soil and dust, are commonly exposed to a buffer or other solution prior to reaction with an analytic reagent and/or detection or measurement of the analyte of interest.
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