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.

Extracted samples can be stored for approximately ten days by sealing both ends of NeedlEx needles using Teflon plugs included with each needle.

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.

By conditioning NeedlEx needles in GC injection ports for 3 minutes after each analysis, needles can be used approximately 25 to 30 times.

Extractions of general organic solvents including ethyl acetate, isobutanol, methyl isobutyl ketone, toluene, xylene, and styrene, etc.

Extractions of short chain amines including trimethylamine, etc.

For fatty acids

Extractions of fatty acids (propionic acid, isobutyric acid, n-butyric acid, isovaleric acid).

For petroleum products

Identifications of trace amounts of petroleum products.

Breakthrough volumes depend on the type of solvent being measured. When the concentration of an organic solvent in air is less than or equal to 100 ng/mL (and for samples with multiple constituents each with a concentration less than or equal to 100 ng/mL), please refer to the sampling volume table shown below.

Trimethylamine can be extracted up to an absolute value of 200 ng.

Propionic, isobutyric, n-butyric, and isovaleric acid can each be extracted up to an absolute value of 10 ug.

Petroleum product type

Up to 100 mL of gasoline vapor and up to 200 mL of each of kerosene and diesel vapor can be sampled.

When disposing of NeedlEx extraction needles, separate and dispose of needle parts according to the type of material each part is made from. As NeedlEx needles are a potential source of injuries, place used needles in an appropriate metal container, and dispose of as waste metal.