The Shimadzu SPD-20A is a workhorse UV-VIS detector that provides sensitive, reliable, and versatile detection for HPLC applications. Mastering its operation starts with understanding the official shimadzu spd20a user manual . This guide has consolidated key information about its specifications, maintenance, and troubleshooting to serve as a quick reference. For full details and the most up-to-date procedures, always refer to the official manuals from Shimadzu. Proper use and regular maintenance, guided by the official documentation, will ensure that your SPD-20A delivers the highest quality analytical data for years to come.
| Symptom | Probable Cause | Corrective Action | |---------|----------------|--------------------| | High baseline noise | Air bubbles in cell | Flush with degassed mobile phase or remove cell and rinse. | | Negative peaks | Sample absorbs less than mobile phase at set wavelength | Change wavelength or check mobile phase UV cutoff. | | Lamp fails to ignite | Lamp expired or power supply issue | Check lamp hours; replace D2 lamp. | | No signal at high sensitivity | Flow cell window dirty | Clean cell with 1M HNO₃, then water, then methanol. | | Wavelength error | Stepper motor failure or filter stuck | Run Wavelength Calibration from service menu (qualified personnel only). |
The detector cell includes a temperature control function (from 5∘C5 raised to the composed with power C above room temperature to 50∘C50 raised to the composed with power C shimadzu spd20a user manual
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190 to 700 nm (SPD-20A) / 190 to 900 nm (SPD-20AV). The Shimadzu SPD-20A is a workhorse UV-VIS detector
Manuals provide standard operating procedures (SOPs) for daily use: Turn on the main power. For the , the display should show "D2" once the lamp is active.
: Never look directly into the lamp or the end of the fiber optic cable while the lamp is on, as UV radiation can cause permanent eye damage. For full details and the most up-to-date procedures,
The detector utilizes a deuterium lamp for UV light and an optional tungsten lamp (for AV model) for visible light. The optical path includes diffraction gratings and mirrors that must be kept clean to maintain sensitivity.
Comprehensive Guide to the Shimadzu SPD-20A Go to product viewer dialog for this item. User Manual: Operation, Maintenance, and Troubleshooting The Shimadzu SPD-20A Go to product viewer dialog for this item.
Allow the lamp to warm up (typically 30–60 minutes) and the baseline to stabilize before starting an analysis.
Connect the tubing coming from the column outlet directly to the bottom port of the flow cell. Use standard 1/16-inch PEEK or stainless steel fittings.