{"@context":{"dc":"http:\/\/purl.org\/dc\/elements\/1.1\/","skos":"http:\/\/www.w3.org\/2004\/02\/skos\/core#","skos:broader":{"@type":"@id"},"skos:inScheme":{"@type":"@id"},"skos:related":{"@type":"@id"},"skos:narrower":{"@type":"@id"},"skos:hasTopConcept":{"@type":"@id"},"skos:topConceptOf":{"@type":"@id"}},"@id":"https:\/\/digilab.ptb.de\/oiml-g-18\/vocab\/skos\/1269","@type":"skos:Concept","skos:prefLabel":{"@language":"en-EN","@value=":"noise           #01480"},"skos:inScheme":"https:\/\/digilab.ptb.de\/oiml-g-18\/vocab\/","dct:created":"2022-12-19 09:13:36","dct:modified":"2022-12-19 13:51:31","skos:scopeNote":[{"@lang":"en-EN","@value":"Althoug long-term noise can occur at any time 01 during an analysis, it can be mistaken for a late-eluting peak. Earlier eluting peaks are usually sharper and less easily confused with long-term noise. "}],"skos:definition":[{"@lang":"en-EN","@value":"a measure of variation in the detector signal; it can be divided into three components:\n\nshort-term noise includes all observable random variations of the detector signal having a frequency of the order of 10\u20132 Hz to 10\u20131 Hz (one or more cycles per lo minute) and should be measured peak to peak\nlong-term noise includes all observable random variations of the detector signal with frequencies between 0.1 Hz and 1.0 Hz\ndrift is the average slope of the baseline signal measured over a minimum period of one-half hour.\n "}],"skos:broader":["https:\/\/digilab.ptb.de\/oiml-g-18\/vocab\/skos\/2"]}