NeedlEx, Amines

The Amine NeedlEx is used to extract short chain amines. The packing material used in the Amine NeedlEx consists of an acidic partitioning agent, the adsorption mechanism is believed to involve ionic bonding. Trimethylamine in air can be sampled up to 300 ml when trimethylamine is present at concentrations of 0.7 ng/ml or less.

Features of NeedlEx
① The NeedlEx enables easy extractions of samples and provides superior reproducibility. By attaching a NeedlEx needle to a gas sampler and simply aspirating a sample, the desired sample can be extracted selectively and accurately concentrated in a very short period of time.
② Adsorbed samples can be stored in NeedlEx needles. Extracted samples can be stored for approximately ten days by sealing both ends of NeedlEx needles using Teflon plugs included with each needle.
③ No additional equipment is required for the adsorption and desorption of samples. Desorption of samples is performed using the heat produced by gas chromatograph injection ports. Extracted samples can be injected into GCs using gas tight syringes and 1 mL of N2.
④ NeedlEx needles can be used repeatedly. By conditioning NeedlEx needles in GC injection ports for 3 minutes after each analysis, needles can be used approximately 25 to 30 times.

The NeedlEx is used to concentrate and accurately analyze solvents present at extremely low concentrations of less than 10 ng/ml (a few ppm). As such, set sampling volumes as low as possible when there is a possibility that the compound to be sampled is present at a high concentration.

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