Used GERSTEL TDSA #9382707 for sale

GERSTEL TDSA (Thermal Desorber/Sorbent Adsorption) is a state-of-the-art laboratory instrument used for static and dynamic thermal desorption/adsorption of volatile organic compounds (VOCs) from a wide range of sample matrices. The specially designed cell incorporates two adsorbents—one thermal desorber and one adsorption trap—that are capable of simultaneously capturing different types of VOCs from a single sample. TDSA is composed of three main pieces: a sample disc, a thermal desorption unit (TDU) and an adsorption unit (AU). The sample disc is a crucible-like device with slots to contain sample matrices. It is typically used with either an inlet adapter or a sample concentrator module. The TDU can be either in-line or off-line. It consists of a heating unit, a vacuum pump, and a hot injector port, all of which are controlled by a programmable logic controller (PLC). The AU is used for cooling the volatiles before sending them to the gas chromatograph (GC). It consists of a cold injection port, a reservoir chamber to hold the sample after collection, and a pump to supply a continuous flow of inert gas (nitrogen) for trapping and desorbing the VOCs. GERSTEL TDSA can be configured to collect volatiles from both manual and automated sample collections. In manual mode, the sample disc is loaded with the sample matrix and the cold inlet port of the AU is connected directly to the TDU. In automated mode, the sample disc can be connected to an autosampler or automatic sampling robot. The resulting volatiles are collected and then pumped to the AU. Thermal desorption can be performed either statically or dynamically. In static mode, the sample is heated at a controlled temperature until all volatile components have desorbed. In dynamic mode, the sample is heated and cooled several times to release different types of VOCs. The resulting VOCs are then sent to the GC for analysis. TDSA is an incredibly useful tool for quantifying and analyzing volatile organic compounds from a wide variety of sample matrices. Its combined thermal desorption and adsorption units enable simultaneous collection of different types of VOCs, making it an essential piece of laboratory equipment for assessing air quality and other environmental concerns.