GC type : GC-17A

Injection Port : OCI/PTV-17

Deactivated silica wool : 10mg (P/N 221-48600)

In the case of PTV, the optimum position of silica wool depends on the sample to analyze. Refer to the following list, examine the optimum position. Use 1-2mg of silica wool for the regular sample injection volume (1.0-2.0ul).

[Needle depth in glass insert]
15mm AOC-14
18mm AOC-17
21mm AOC-20i
27mm Manual injection (AOC syringe : 43mm needle) 6mm needle guide
22mm Manual injection (AOC syringe : 43mm needle) 11mm needle guide
35mm Manual injection (Hamilton syringe : 51mm needle) 6mm needle guide
30mm Manual injection (Hamilton syringe : 51mm needle) 11mm needle guide

Analyzing compounds those are unstable for heat with using the cold-injection method, place the silica wool close to the needle top.

The influence of the amount and the position of the silica wool for the cold-injection method analysis is less, comparing with hot-injection method.

Using deactivated silica wool and glass inserts are recommended to avoid adsorption and decomposition in the sample injection port.

Deactivated silica wool : 10mg (P/N 221-48600)

Glass Insert Deactivation (DMCS) Procedure