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HPLC

Frequently Referenced FAQ

Latest FAQ

FAQ within [ HPLC ]

111-120 of Total 943

≪ 12 / 95page ≫

  • Carryover Does Not Disappear

    Autosamplers include rinsing functionality. Rinse the exterior and interior surfaces of the needle with solvent. Change the type of rinse solution and rins... Show Detail

    • No：4278
    • Date of Issue：2020/12/03 10:16
    • Category： Common
    • Brached FAQ

  • Poor Area Value Reproducibility

    If the solvent delivery pump flow is unstable, then area values and reproducibility are also unstable. Check the solvent delivery pump for pulsation, leakage... Show Detail

    • No：4276
    • Date of Issue：2020/12/03 10:09
    • Category： Common
    • Brached FAQ

  • Noise Appears in Baseline

    Tighten the leaking connection. There might be bubbles in the cell. Remove bubbles from inside the flow cell. «How to Remove Bubbles from Inside the Fl... Show Detail

    • No：4275
    • Date of Issue：2020/12/03 10:03
    • Category： Detector
    • Brached FAQ

  • Baseline Does Not Stabilize

    Tighten the leaking connection. Prevent air flow from directly hitting the instrument. If a detector with temperature-control functionality is used, check ... Show Detail

    • No：4274
    • Date of Issue：2020/12/03 10:01
    • Category： Common
    • Brached FAQ

  • Solvent Delivery Pressure Increases

    Inspect the detector flow channels. Inspect/replace the column. Does the pressure increase even after backflushing the outlet tubing? Replace the outl... Show Detail

    • No：4273
    • Date of Issue：2020/12/03 09:56
    • Category： Common
    • Brached FAQ

  • Solvent Flow Does Not Stabilize

    Manually purge the flow channels, degas the mobile phase, clean the suction filter, and purge the flow channels. Replace the plunger seal. Check the plunge... Show Detail

  • Communication fails

    Restart the computer and instrument. Contact a Shimadzu sales or service representative. Reconfigure the workstation configuration settings. Show Detail

    • No：4271
    • Date of Issue：2020/12/03 09:37
    • Category： System Controller
    • Brached FAQ

  • Noise is at least ten times higher when using the two-wav...

    Are changes in the mobile phase absorbance level measured at extremely large wavelength levels? Because this detector detects two wavelengths during... Show Detail

    • No：4269
    • Date of Issue：2020/12/03 09:24
    • Category： Detector

  • Spiky noise is output at irregular intervals

    Are there bubbles accumulated in the flow cell? Confirm whether the baseline changes significantly when the cell outlet pipe is blocked. Alternatively... Show Detail

    • No：4268
    • Date of Issue：2020/12/03 09:24
    • Category： Detector

  • The baseline undulates

    Is there a strong air flow blowing onto the system from an air conditioner, for example? Use a barrier or other means to block air flow from hitting t... Show Detail

    • No：4267
    • Date of Issue：2020/12/03 09:24
    • Category： Common

111-120 of Total 943

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