Controllable solid phase micro-extraction handle

[0029] Such as figure 1 As shown, the controllable solid phase micro extraction handle includes a handle barrel 1, a metal sleeve 7 and an extraction probe 8 with stainless steel wire or silicon oxide as a support material. The handle barrel 1 is provided with a positioning ring 3, and is embedded with a push button 2 arranged on a zigzag guide rail 5; the lower end of the handle barrel 1 is provided with a metal sleeve fixing bracket 6, the metal sleeve fixing bracket 6 and the metal sleeve 7 The bottom end of the push button 2 is connected to the metal sleeve fixing bracket 6; the extraction probe 8 passes through the metal sleeve 7 and the metal sleeve fixing bracket 6 in turn, and is connected to the handle barrel 1 through the push button 2.

[0030] Among them: the bottom end of the push button 2 is connected to the metal sleeve fixing bracket 6 through the spring 4.

[0031] The handle barrel 1 includes an upper half 11 and a lower half 12 connected together (see figure 2 ), the upper half 11 is provided with a scale 113, one end of which is provided with a guide rail fixing groove 111, and a push button sliding groove 112 is provided in it; the upper half 11 opposite to the guide rail fixing groove 111 is provided with a thread I 114; One end of the lower part 12 is provided with a thread II 121, and the other end is provided with a metal sleeve fixing bracket slot 122; the lower half 12 is connected to the metal sleeve fixing bracket 6 through a metal sleeve fixing bracket slot 122; a guide rail fixing slot 111 is connected with the sawtooth guide rail 5; the push button sliding groove 112 is connected with the push button 2.

[0032] The upper part 11 and the lower part 12 are butted together by the thread I 114 and the thread II 121.

[0033] The push button 2 is respectively provided with an indicator line 21, a slot 22, a spring slot 24 connected to the push button spring 25, and a metal reed 27 inserted in the metal reed slot 26 (see image 3 , Figure 4 , Image 6 ); The slot 22 is composed of the handle barrel clamping slot 221 and the sawtooth guide rail clamping slot 222; the handle barrel clamping slot 221 is connected to the handle barrel 1; the sawtooth guide rail clamping slot 222 is connected to the sawtooth guide rail 5, the sawtooth guide rail 5 and The metal reeds 27 are connected. The push button spring slot 24 can be pushed up and down within a certain range.

[0034] The bottom end of the push button 2 is connected to the extraction probe 8 through an extraction probe fixing device 23. The extraction probe fixing device 23 includes a fixing screw 231 (see Figure 5 ); The extraction probe jack 232 is provided with a fixing screw rubber pad 233; the fixing screw 231 is connected with the extraction probe 8.

[0035] The metal casing holder 6 includes an upper cover 61 and a lower cover 63 that are connected together by threads Ⅲ (see Figure 7 ); A gasket 61 is provided between the upper cover 61 and the lower cover 63; the lower cover 63 is welded with a metal sleeve 7.

[0036] The method of use of the present invention is as follows:

[0037] ⑴Unscrew the handle barrel 1, insert the handle barrel clamping slot 221 and the sawtooth guide slot 222 of the push button 2 into the button sliding groove 112 of the handle barrel 1 and the sawtooth track 5 respectively, and gently push the sawtooth track 5 to make it The upper end is just inserted into the guide rail fixing groove 111 in the upper half of the handle barrel.

[0038] ⑵Put the extraction probe 8 through the metal sleeve 7 from the uncoated end, insert it into the extraction probe jack 232 at the lower end of the push button 2 through the sealing gasket 61 of the metal sleeve fixing bracket 6, adjust the insertion depth to make the indicator mark When 21 is at the 0 mark of the scale line 113, the coating front end of the extraction probe 8 just does not expose the metal sleeve 7. Tighten the fixing screw 231 to fix the extraction probe 8 on the push button 2, and finally set the spring 4 on the sawtooth rail 5. on.

[0039] ⑶ Put the metal sleeve fixing bracket 6 into the metal sleeve fixing bracket slot 122 of the lower part 12 of the handle barrel 1, and tightly connect with the upper part 11 through the thread I 114 and the thread II 121, and fix the extraction handle according to actual needs. On a suitable metal bracket, push the button 2 to extend the extraction probe 8 into the actual sample, use the indicator line 21 and the scale line 113 to observe the exposed length of the extraction probe 8, and then install the positioning ring 3 on the appropriate position of the handle barrel 1. , Used to fix the extraction probe 8 to maintain the same coating length and position during each extraction process. After the extraction is completed, fully retract the extraction probe 8 into the metal sleeve 7 through the push button 2, insert the metal sleeve 7 into the gas chromatography vaporization chamber, and push out the extraction probe 8. After the thermal analysis of the target analyte is completed, the extraction The probe 8 is retracted into the metal sleeve 7, and finally the extraction handle is pulled out to complete the sample injection.