Shanghai Xinzhuang Instrument Co., Ltd. has developed the LNB brand solid-phase extraction (SPE) device, a cutting-edge and environmentally friendly solution that is at the forefront of domestic technology. This SPE device uses a solid adsorbent to selectively capture target compounds from liquid samples, effectively removing matrix interferences and other contaminants. The target compound is then eluted using a suitable solvent or released through heating, enabling efficient sample separation, purification, and concentration. This process significantly reduces background interference and enhances detection sensitivity, making it ideal for applications in food safety testing, agricultural residue monitoring, medical research, environmental analysis, commodity inspection, tap water quality control, and chemical laboratories.
Here are some frequently asked questions about solid-phase extraction:
1. **What loading method is most suitable for SPE?**
Currently, both positive and negative pressure loading methods are used in the market. However, negative pressure loading often leads to unstable flow rates, which can affect recovery rates and instrument reproducibility. Therefore, most leading manufacturers prefer positive pressure loading. The automated SPE system from Shanghai Xinzhuang uses a high-precision syringe pump to apply controlled pressure, ensuring accurate flow rate management and improving overall instrument performance and sample recovery.
2. **What is the required processing speed for automated SPE?**
The typical SPE cycle for a single sample takes around 20 minutes, and most systems operate similarly. To increase efficiency, the more samples processed simultaneously, the faster the throughput. The fully automated SPE system with 6 channels and 3 modes offers flexible operation, maximizing sample processing speed without compromising accuracy.
3. **Can the automatic SPE instrument prevent flow path blockage?**
A common issue with SPE instruments is clogging of the flow path, which can lead to equipment failure, sample leakage, and cross-contamination. The LNB SPE system is equipped with a high-sensitivity pressure sensor that detects when the pressure exceeds 0.6 MPa and automatically alerts the user, helping to protect the system and avoid damage.
4. **How does the instrument prevent cross-contamination?**
Some SPE systems use shared tubing for samples and solvents, increasing the risk of contamination. The LNB system features a flow separation unit that automatically selects the appropriate solvent and directs organic waste into a dedicated channel, significantly reducing the chances of cross-contamination and ensuring reliable results.
In addition to its advanced SPE technology, Shanghai Xinzhuang Instrument Co., Ltd. also develops the LNB brand carbon dioxide incubator, designed to be energy-efficient, eco-friendly, and technologically advanced. As a professional manufacturer, the company ensures high-quality, secure, and cost-effective solutions tailored to meet diverse laboratory needs.
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