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Votre partenaire en consommables de chromatographie HPLC et GC


Notes Techniques

 En tant que spécialiste de longue date de la chromatographie, l'objectif d'imChem est de partager ses larges connaissances avec ses utilisateurs sous forme de notes et de conseils utiles pour améliorer votre chromatographie. 


  • hplc    Regeneration of reversed phase HPLC columns  »  (0.16 Mo)
    One of the most frequent questions we are asked concerns the best process for washing and regenerating HPLC columns...
  • hplc    Split/double peaks in HPLC  »  (0.17 Mo)
    The causes usually lie in the fact that the pH of the mobile phase is too close to the pKa of a functional group of the...
  • hplc    Erratic pressures in the HPLC system  »  (0.16 Mo)
    More than once we have been told by HPLC users, that there is an erratic pressure on their system, usually thinking that this symptom comes from the column...
  • hplc    Filtration in HPLC  »  (0.17 Mo)
    One of the crucial points for the longevity of columns and HPLC systems is the filtration of whatever we insert into an HPLC system, whether samples or eluents...
  • hplc    HPLC buffer precipitation  »  (0.16 Mo)
    One of the recurring problems that most questions we receive is about high pressures in an HPLC column. After asking some questions and detecting some obvious symptoms...
  • hplc-usp    HPLC USP – Selection Guide  »  (0.30 Mo)
    7 pages of USP phase/columns selection table...
  • hplc    Normal phase HPLC column regeneration  »  (0.17 Mo)
    Here are some general procedures to follow to regenerate normal phase columns...
  • hplc    Pressure drop in the HPLC system  »  (0.17 Mo)
    Virtually any HPLC user knows the reasons for a pressure increase in the HPLC system, but what can be done if a pressure drop occurs?...
  • hplc    Reduction of solvent consumption in HPLC  »  (0.17 Mo)
    With the past shortage of Acetonitrile, the consequent increase in its price has had a significant impact on the cost of each HPLC analysis and...
  • gc    How to degas your eluents  »  (0.24 Mo)
    The degassing of eluents in HPLC is an important step to ensure a high sensitivity and detection limit in your HPLC method. The existence of excess oxygen dissolved in the eluent promotes the formation of small bubbles that...
  • gc tips    Ferrule Choice  »  (0.27 Mo)
    There are frequent doubts concerning the different materials used to manufacture ferrules for the GC columns. Despite having the same dimensions and the same way of installing...
  • gc tips    Conditionning of GC capillary columns  »  (0.16 Mo)
    One of the most recurring questions concerns the proper conditioning of the GC columns, so following you will find our recommendations for proper conditioning...
  • gc    Separation of late peaks in GC  »  (0.17 Mo)
    One of the most frequently asked questions in GC is how to improve the separation of late peaks in GC. Most of the time...
  • gc    Separation of peaks with low GC retention  »  (0.17 Mo)
    Separation of peaks with low GC retention ?...


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