QHSS-40: A High-Performance Automated Headspace System for Reliable and Reproducible Analyses
The QHSS-40 by Quma is an automatic headspace sampler designed to meet the demands of laboratories seeking rigorous analysis of up to 40 samples in sequence. Unlike many systems on the market, this device operates without a syringe. Instead, it uses a gas sampling valve with a sample loop maintained at a constant temperature of up to 350 °C. This distinctive feature eliminates memory effects, particularly in the analysis of polar compounds with high boiling points, ensuring reliable and reproducible results.
The QHSS-40 is compatible with 10 mL or 20 mL headspace vials, whether crimped or screw-capped. It includes an incubation oven that simultaneously heats up to 12 samples, with a temperature range adjustable from 40 °C to 200 °C, accurate to the degree. An integrated agitator ensures homogeneous gas-phase distribution—an essential condition for obtaining a representative sample.
Thanks to a precision-controlled six-port electric injection valve (VICI) and an RS-232 communication interface, the system can be connected to various gas chromatographs (GC). A fused silica transfer line is easily installable, ensuring optimal compatibility with a wide range of GC instruments, including those with electronic pressure control (EPC).
The QHSS-40 enables control and storage of analytical parameters in nine distinct method files, and automatically recognizes samples. The carrier gas is regulated directly by the GC, while the auxiliary gas is controlled by the QHSS-40 itself. An alternative version, known as "Press and Inject", is also available, offering enhanced sensitivity and compatibility with 100 mL vials.
Compact and user-friendly, this instrument integrates easily into any analytical environment where precision and reproducibility are critical. Measuring 29 cm wide, 40 cm high, and 60 cm deep, it fits comfortably on standard laboratory benches. Its mechanical robustness and advanced thermal design ensure long-term durability and consistent performance, even under intensive use.
