: Replace the D2 lamp roughly every 1,200 to 2,000 hours. If you notice increased baseline noise or failing sensitivity, it’s likely time for a swap SHIMADZU CORPORATION Cleanliness
: Use this to monitor two wavelengths simultaneously. This is particularly useful for peak purity checks or monitoring different classes of compounds in a single injection. 2. Proactive Maintenance & Troubleshooting shimadzu spd20a user manual better
The Shimadzu SPD-20A is a versatile UV-Vis detector designed for high-performance liquid chromatography (HPLC) systems. Its key features include: : Replace the D2 lamp roughly every 1,200 to 2,000 hours
| | Don’t | | :--- | :--- | | Do let the lamp warm up for 60 minutes before running a calibrated method. | Don’t turn the detector off and on repeatedly (stresses the igniter). | | Do flush the cell with degassed water after using buffers. | Don’t leave a buffer in the cell overnight—crystals will scratch the quartz windows. | | Do keep a log of lamp energy readings (in Monitor mode). | Don’t trust the "Lamp hours" counter exclusively—it doesn't account for intensity decay over time. | | Do run a Wavelength Calibration after moving the instrument. | Don't open the optical unit unless you are in a cleanroom—dust kills sensitivity. | | Don’t turn the detector off and on
The SPD-20A is a UV-VIS detector optimized for high-sensitivity, high-speed analysis (UFLC).
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