The Shimadzu SPD-20A Go to product viewer dialog for this item.
is a high-performance UV-Vis detector designed for the Prominence HPLC series. It is widely recognized for its high sensitivity and low noise levels, making it a staple in analytical laboratories. Core Specifications & Features Wavelength Range: Covers
, allowing for the detection of a wide variety of compounds.
Dual-Wavelength Mode: Capable of monitoring two different wavelengths simultaneously, which is essential for identifying peaks and ensuring purity. Sensitivity: Features a noise level of and a drift of , ensuring reliable data even at low concentrations.
Temperature-Controlled Cell: Includes a standard thermostatic flow cell to minimize the impact of ambient temperature fluctuations on the baseline. Operational Guidelines
Based on standard Shimadzu Prominence manuals, the following steps are critical for safe and effective use: System Initialization: Ensure the waste line is properly secured.
Perform a "Lamp ON" command via the front panel or LabSolutions software. Allow at least 30 minutes for the Deuterium ( D2cap D sub 2 ) lamp to stabilize. Purging and Priming:
Flush the flow cell with a mobile phase that is transparent at your target wavelength.
Use the "Zero" or "Autozero" function once the baseline has stabilized to set the current absorbance to Wavelength Calibration:
The unit performs a self-diagnostic check upon startup, using the emission lines of the D2cap D sub 2 lamp to calibrate the monochromator automatically. Maintenance and Troubleshooting Lamp Replacement: The D2cap D sub 2 shimadzu spd20a user manual
lamp typically has a lifespan of approximately 2,000 hours. If the "Energy" levels drop significantly or the baseline becomes excessively noisy, the lamp likely needs replacement.
Flow Cell Cleaning: If you notice high backpressure or ghost peaks, the flow cell may be contaminated. Flush with a compatible strong solvent (like Isopropanol) or a dilute nitric acid solution (refer to the specific manual for concentrations).
Leak Management: Always check the leak sensor at the bottom of the unit. If a leak is detected, the system will automatically stop the pump to prevent damage. Safety Precautions
UV Exposure: 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.
Solvent Compatibility: Ensure all buffers and solvents are filtered ( or finer) to prevent clogging the delicate flow cell. D2cap D sub 2
lamp or how to configure dual-wavelength settings in LabSolutions?
Shimadzu SPD-20A UV-Vis detector Go to product viewer dialog for this item.
is more than just a standard benchtop tool; it’s a high-sensitivity workhorse designed for the Prominence HPLC series. While the user manual covers basic operations, its most "interesting" capabilities lie in how it handles light and temperature to achieve extreme precision. Hidden "Superpowers" of the Go to product viewer dialog for this item.
Simultaneous Multi-Wavelength Detection: You don't have to choose just one wavelength. The The Shimadzu SPD-20A Go to product viewer dialog
can monitor two different wavelengths simultaneously. This is ideal for qualitative purity checks using ratio chromatograms, where you compare the signals to see if a peak is truly a single compound or two overlapping ones.
The "Eco-Product Plus" Edge: This detector is certified as a Shimadzu Eco-Product, meaning it uses 35% less power than previous models without sacrificing its world-class noise level (0.5 x 10⁻⁵ AU). SR-Cell (Sensitivity and Resolution):
It features a specialized "SR-Cell" that significantly reduces peak dispersion, which is what allows it to transition smoothly between standard HPLC and high-speed UHPLC applications.
Thermal Control: Most detectors are at the mercy of room temperature. The
includes a temperature-controlled flow cell as standard, which eliminates baseline drift caused by shifting air conditioning or lab temperatures. Quick Troubleshooting "Cheat Sheet"
The Nexera Virtual Advisor highlights key indicators often missed in the manual: Power Indicator Bar: Green: All systems go. Orange: The unit is in Sleep Mode to save lamp life.
Red: An error has occurred (often a lamp failure or communication break).
Common "Drift" Culprit: If your baseline is drifting, it’s often dirty cell lenses rather than the lamp itself. You can dismantle the flow cell to clean or replace these lenses.
The Bubble Fix: If you see "sawtooth" or regular spikes in your data, it's usually air in the cell. A common lab trick is to apply light backpressure to the cell outlet using a syringe or specific tubing to force the bubbles out. SPD-20A vs. SPD-20AV If you have the A concise summary of the manual’s key sections
variant, it adds a Tungsten lamp to the standard Deuterium lamp. This allows it to cover the full spectrum (190–900 nm) with simultaneous illumination, meaning no warm-up delays when switching between UV and visible light ranges. UV-VIS detector / Photodiode Array Detector - Shimadzu
I can’t provide or reproduce the full user manual (copyrighted material) for the Shimadzu SPD-20A. I can, however, help with any of the following:
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Understanding Your Shimadzu SPD-20A: A Comprehensive User Manual Guide
The Shimadzu SPD-20A is a versatile and widely used UV-Vis detector in various laboratory settings, particularly in High-Performance Liquid Chromatography (HPLC) systems. This detector is prized for its reliability, sensitivity, and the crucial role it plays in analyzing the absorbance of compounds in solution. In this blog post, we'll walk you through the essential components, operation, maintenance, and troubleshooting tips for the Shimadzu SPD-20A, ensuring you get the most out of your device.
Before diving into procedures, here are the core specifications you will consistently reference in the Shimadzu SPD-20A user manual:
| Parameter | Specification | |-------------------------|--------------------------------------------------| | Wavelength Range | 190 – 600 nm | | Light Source | Deuterium lamp (D2) for UV; Tungsten lamp (optional for Vis) | | Bandwidth | 8 nm | | Wavelength Accuracy | ±1 nm | | Noise Level | ±0.25 × 10⁻⁵ AU (at 254 nm, 2 sec time constant) | | Drift | ±1 × 10⁻⁴ AU/h | | Cell Volume | 12 µL (standard), 8 µL (semi-micro), 2.5 µL (micro) | | Time Constant | 0.1 to 3.0 sec (adjustable) |
Keep a printed copy of this table near your instrument.
The official PDF is available from Shimadzu’s global support portal. Here are trusted sources:
www.shimadzu.com → Support → Document Library → Search "SPD-20A".manualslib.com and manualmachine.com host scanned copies—but verify they match your revision (look for Revision A or B on the cover).Warning: Avoid sites requiring credit card information. Shimadzu provides user manuals for free as PDFs.