Advanced sample preparation: DLLME and VMAX vials
The automation of sample preparation with bilimex®.
The bilimex® range includes various products for DLLME.
DLLME (dispersive liquid-liquid microextraction) is an effective method for concentrating liquids in chemical analysis.
This method is fast, efficient and requires only small amounts of solvents. In DLLME, immiscible solvent and miscible solvent are added to an aqueous sample to separate the analyte from interfering substances. LABC-Labortechnik offers sample vessels for manual and automated DLLME with different density gradients.
With the VMAX Vial ND18, the method can be easily integrated into existing autosampler systems.
The combination of Dispersive Liquid-Liquid-Microextraction (DLLME) and VMAX vials with ND18 fine thread offers an outstanding solution for sample preparation in analytical chemistry.
DLLME is characterized by its low solvent consumption, fast execution and high recovery rate, while the VMAX vials allow an almost complete emptying of the sample volume due to their specially manufactured bottom.
These features make both technologies environmentally friendly and cost-efficient.
In the outlined DLLME, an aqueous sample is mixed with a water-immiscible extractant and a water-miscible dispersant. After mixing and emulsion formation, two phases are separated by centrifugation.
The extraction agent – HD – with the concentrated analyte and the interfering matrix removed is located in the conical base.
It is extracted using a microliter syringe and injected into the analyzer.
The extraction medium can be easily removed by using a conical bilimex tube.
Bilimex®HD-AS can be used in swing-out rotors up to 3500 rpm and is designed for DLLME with high-density (HD) extractants.
In addition, the VMAX vials offer seamless integration into automated systems thanks to their magnetic ND18 closures, which further increases the efficiency and reproducibility of analyses.
The versatility of both technologies enables their application in various areas of chemical analysis, from storing and sampling liquid samples to performing DLLME.
This combination of efficiency, versatility and environmental friendliness makes them a preferred choice for scientists.
