Gaois

This is a static copy of data that is exported from IATE on an occasional basis. It should not be assumed that information provided about an entry here will always correspond to the current version of the entry in IATE. That current version can be checked by clicking on the link on the upper right hand side of each entry. More information »

1 result

  1. INDUSTRY|chemistry
    tiomsaitheoir codán Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    fraction collector | fraction accumulator
    en
    Definition device that allows regular or specified samples to be taken from a column eluate and stored in a retrievable form Reference "Chromatography Online. Fraction Collector, http://www.chromatography-online.org/topics/fraction/collector.html [15.4.2013]"
    Comment The storage vessels are usually small sample tubes or vials that are oriented in a rotating disk or in a moving belt, there movement usually being controlled by a microprocessor. On receiving a signal from the microprocessor, the next vial is placed under the column outlet and the eluate collected until receiving another signal from the computer. Once the properties of the chromatogram that describes the separation has been ascertained, then the collection program can be defined. The fractions can be collected on a basis of time either at regular intervals or a specific times to collect specific peaks. Alternatively the fractions can be collected by monitoring the detector output and when a peak starts to elute the fraction collector is activated and the peak collected in a specific vial. When the peak returns to base line the column eluate is then directed to waste until the next peak starts eluting. Fraction collectors are in common use with most liquid chromatographs. They are used to collect samples for further purification, subsequent exmination by spectroscopic techniques or for biological or organoleptic testing