Cov kev daws teeb meem rau cov organic cov cheeb tsam (vocs) piv txwv cov qauv ua tsis tiav: cov tswv yim tseem ceeb los txhim kho kev txheeb xyuas qhov tseeb

rau vial kaus mom thiab septa, koj yuav tsum paub ，Nyem qhov no kom paub

I. Cov teeb meem tsis ua tiav

1. Cov kev txwv ntawm Tsoos Ntsia Hlau Caps

Txheem ntsia hlau-cap vials cia ntawm phau ntawv ceev, ua rau tsis sib xws siab siab. Cov kev hloov pauv kub tuaj yeem ua rau cua sov thiab kev cog lus, ua rau micro roj txi.

2. Volatilization txaus ntshai ntawm tsawg-npau-boiling-point vocs

Tsawg-npau-boiling-point cov tebchaw zoo li benzene derivatives (boiling point <150 ° C) tuaj yeem nres tsheb sai sai ntawm chav tsev kub. Yog tias lub vial sealing gasket muaj cov kev ua tiav siab lossis cov tshuaj tsis zoo, cov qauv poob yog cov nqi txo qis dua 30%.

3. Hla-paug thiab kev ntsuas yuam kev

Kev sib khi ua tsis tiav tsis tsuas yog ua rau poob ntawm lub hom phiaj analytes tab sis tej zaum kuj tseem yuav qhia cov paug tsis tau sab nraud. Piv txwv li, kev co thaum lub sij hawm thauj tuaj yeem xoob vial, ua rau cov kab mob hla kev sib kis ntawm cov txiaj ntsig GC-MS Analytical cov txiaj ntsig.

Ii. Peb Kev Siv Kev Siv Rau Kev Ua Haujlwm Zoo

Daws 1:Pre-sluit PTFE \ / Silicone Composite Septa
Cov txiaj ntsig kev ua haujlwm:
PTFE (polytetrafluoroethylene) muaj cov tshuaj lom neeg muaj zog, tiv thaiv cov vocs adsorption.
Silicone Txheej muab Elicasting Dushioning, haum rau qhov kub hloov.

Pre-sluit tsim txo qhov kev pheej hmoo ntawm kev txiav tawm ntawm lub sijhawm thaum lub sij hawm rab koob.

Xav paub yuav ua li cas xaiv sterta pre slit lossis tsis?Nyem qhov no kom paub

Muaj feem cuam tshuam: VOCs tsom xam yog ib EPA 8260, HJ 644-2013, thiab cov qauv zoo sib xws.

Kev daws 2: Torque-tswj cov ntsiab lus Cappers

• Cov nqi tseem ceeb:

  • Txhawb kev tswj sealing Sealing foring siab (Pom zoo torque: 10-15 nti-phaus), zam kev tsis sib xws los ntawm kev tuav ceev.

  • Ua kom muaj kev sib tiv tauj zoo ntawm lub hau thiab gasket, tiv thaiv kom xau thaum lub sijhawm cia.

Kev daws 3:Qauv vials raws li EPA 8260 tus qauv

• Cov Qauv Xaiv:

  • High muaj kev sib xws hauv Vial qhov ncauj ntev (piv txwv li,40ml wot-qhov ncauj vials).

  • Cov khoom siv iav yuav tsum yog kua qaub thiab alkali-resistant nrog qis ualaj.

  • Nrog cov sainta muaj ntawv, siv tau los ntawm kev sim sab qab.

III. Kev Kawm Kev Kawm: Qhov cuam tshuam ntawm kev ua haujlwm tsim nyog ntawm kev txheeb xyuas qhov tseeb

Ib puag ncig kuaj sim kev ua yeeb yam ntawm tus qauv ntsia hlau-cap vials thiab optimized sealing solutions:

IV. Xaus thiab lus pom zoo

Cov sealing swb hauv VOCs cov qauv tsis tseem tsis tseem ceeb - lawv ncaj qha cuam tshuam txog qhov siv tau thiab kev tshawb fawb txog kev pom zoo ntawm cov ntawv ceebtalal analytical. Lub chaw ua hauj lwm yuav tsum:

1. Ua ntej tshaj plaws-Sealing cov khoom lag luam zoo: Xaiv cov ntawv pov thawj ua ntej PTFE \ / Silicone sterma thiab dav-qhov ncauj coj mus kuaj.

2. Txheej Txheem Sealing Cov Txheej Txheem: Siv Torque-tswj cov txiv ntoo thiab tsis tu ncua cappate sealing siab.

3. Txhim khu kev tswj hwm zoo: soj ntsuam sealing kev ua tau los ntawm kev sim ua kom rov qab thiab hloov AGED SEPTA sai.

Yav tom ntej saib xyuas: Nrog cov kev nce toj hauv cov qauv zoo li EPA txoj kev mus rau-17 rau cov qauv ntsuas kev coj ua tau zoo yuav dhau los ua kev lag luam tshiab.