Overview
The LB-200 Liquid-Liquid Extractor is a benchtop instrument engineered for high-purity separations in analytical and industrial laboratories. Its modular design accommodates batch processing of 50-200ml samples, making it ideal for quality control labs requiring reproducible extraction results. Developed with GLP compliance in mind, the system integrates safety features including over-temperature protection and solvent vapor detection. The standardized interface allows connection to rotary evaporators for streamlined solvent recovery workflows.
Structure and Working Principle
The extractor comprises three main subsystems: a thermostated mixing chamber with PTFE-coated impellers, a separation funnel with optical phase detection, and a programmable control unit. The process begins with precise heating of the sample vessel to optimize partition coefficients, followed by controlled agitation to create maximum interfacial area. Phase separation occurs in the graduated separation chamber, where infrared sensors automatically detect the interface between organic and aqueous layers. The system's patented laminar flow design minimizes emulsion formation, achieving >99% phase separation efficiency for most solvent pairs.
Key Features
Temperature stability of ±0.5°C across the 20-80°C range ensures consistent extraction yields, critical for methods like EPA 3510C. The brushless DC motor provides 50-1,500 rpm mixing without spark risk, while the corrosion-resistant fluid path accommodates acids up to pH 1 and bases to pH 13. Advanced models feature method memory for 50 protocols and digital output for LIMS integration. The optional chilling module allows extraction of volatile compounds at sub-ambient temperatures, expanding application scope to essential oil recovery and heat-sensitive compounds.
Application Areas
Pharmaceutical QC labs utilize the LB-200 for API impurity profiling and dissolution testing, where consistent recovery rates are mandatory. Environmental testing centers apply it for EPA-compliant extractions of PAHs and PCBs from soil samples, with throughput of up to 20 samples per 8-hour shift. In food safety analysis, the instrument's gentle mixing preserves delicate matrices during pesticide residue extraction. Petrochemical researchers value its ability to handle viscous samples like crude oil fractions, with heating capabilities that maintain optimal viscosity for phase separation.
Maintenance and Precautions
Monthly maintenance should include inspection of PTFE seals and calibration of temperature sensors using NIST-traceable standards. The agitation shaft requires lubrication with high-vacuum grease every 500 operating hours to prevent wear. Always purge the system with inert gas when working with peroxidizable solvents. For halogenated solvent use, ensure the optional vapor containment kit is installed. The glass components demand careful handling - replacement parts should be borosilicate glass 3.3 for thermal shock resistance.
B2B Procurement Guide
Industrial buyers should verify CE/UL certification for their region and request material certificates for wetted parts. Key procurement considerations include: maximum sample viscosity rating (standard models handle up to 500 cP), available accessories like micro-extraction kits, and service contract options. Leading manufacturers typically offer 2-year warranties covering parts and labor. Bulk purchasers (5+ units) can expect 12-15% discounting. Evaluate supplier capability to provide ISO 17025-compliant calibration services and on-site training for technical staff.
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