The solid phase extraction device has two ways to extract

Shanghai Xinzhuang Instrument Co., Ltd. has developed the LNB brand solid phase extraction (SPE) device, which is energy-efficient, environmentally friendly, and at the forefront of domestic technology. The SPE device utilizes a solid adsorbent to capture target compounds from liquid samples, separating them from the sample matrix and interfering substances. It then elutes the target compound using a suitable solvent or desorbs it through heating, achieving the goal of sample separation, purification, and concentration. This process helps reduce matrix interference and enhance detection sensitivity. The device is widely used in food safety testing, agricultural residue monitoring, medical and health fields, environmental protection, commodity inspection, tap water analysis, and chemical production laboratories. Here are some frequently asked questions about solid phase extraction: First, what loading method is best for solid phase extraction? Currently, both positive and negative pressure loading methods are available on the market. However, negative pressure loading often leads to unstable flow control, resulting in poor recovery rates and low instrument repeatability. Most leading manufacturers now use positive pressure loading. This approach employs a high-precision syringe pump to pressurize the sample, ensuring precise control over the flow rate and significantly improving the instrument’s consistency and sample recovery. Second, what is the expected processing speed for automated solid phase extraction? The typical SPE cycle for one sample takes around 20 minutes, and most instruments operate similarly. Therefore, the more samples an instrument can process at once, the faster the overall throughput. The fully automated SPE system with 6 channels and 3 modes offers maximum flexibility and efficiency, allowing users to handle multiple samples quickly and effectively. Third, can the automatic SPE instrument prevent blockage during the extraction process? A common issue with automated SPE systems is clogging of the flow path, which can lead to equipment failure. If the column becomes blocked, many systems lack automatic detection, causing leaks and cross-contamination. The LNB SPE device is equipped with a high-sensitivity pressure sensor that triggers an alarm when the pressure exceeds 0.6 MPa, protecting the system and preventing damage. Fourth, how does the automatic SPE instrument manage cross-contamination? Some systems use the same tubing for both the sample and solvents, increasing the risk of contamination. Instruments without proper cleaning functions may leave residues in the tubing, leading to experimental errors. The LNB system uses a flow separation unit that automatically selects solvents and directs organic waste into an independent channel, effectively reducing cross-contamination risks. Fifth, how should users choose the right SPE method? One of the easiest ways to establish an SPE method is to refer to published standards or guidelines provided by SPE column manufacturers. However, since sample matrices and target compounds can vary, these standard methods may not always be optimal. Users should consider optimizing the extraction parameters based on their specific needs and conditions. For more information, visit: http://

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