Ukufunyanwa kweendawo ezilungisiweyo eziguqukayo (VOCs) licandelo elibalulekileyo ekubekweni kweliso kwindalo, ucoceko lwemizi-mveliso kunye nempilo kunye nokhuseleko emsebenzini. Idatha yoxinaniso yamanqaku aphantsi anamanqaku aphantsi anjenge-Benzene, i-toulene, kunye ne-xyynene ibe nefuthe lokulawula ukungcoliseka kongcoliseko kunye novavanyo lomngcipheko wezempilo. Nangona kunjalo, ukungafumani kutyhileka ukuqokelelwa kwesampulu, ukugcinwa, kunye nokuhamba kunokukhokelela kwilahleko ye-VOCS, kukhokelela ekunxaxheni okanye kwiziphumo ezingasebenziyo. Ukusilela kokutywina kweziko lemveli le-cap-cap sele yibhotile ephambili ekucoceni ukuchaneka kohlalutyo. Itekhnoloji yokutywina inokusetyenziswa njani? Eli nqaku libonelela ngohlalutyo olunzulu lwezisombululo ezinokubakho.

Kwi-vial caps kunye ne-septa, kufuneka uyazi ，Cofa apha ukwazi

I. Imiba eqhelekileyo yokutywina

Ukunqongophala kwezinto zeCAPS yemveli

I-screw-cap vils ixhomekeke kwincwadana yemigaqo, ikhokelela kuxinzelelo olungalinganiyo. Ukuguquguquka kweqondo lobushushu kunokubangela ukwanda kwe-shirmal kunye nokuchasana, okukhokelela kwizinto ezincinci zerhasi.

Imingcipheko yokuzibophelela kwe-Vocs ye-Poiling ephantsi

I-Poiling-Failing-I-Poiling-Poiling-Poiling Veliaves Derivatives (indawo yokubila i <150 ° C) inokuba bubuchule ngokukhawuleza kubushushu begumbi. Ukuba i-vial yokutywina i-vial yokutywina inolwazi oluphezulu okanye ukungavisisani kweekhemikhali, ilahleko yesampulu iyanda, inokubangela ukuba kuncitshiswe amaxabiso okubuyisela ngaphezulu kwe-30%.

Ngaba ufuna ukwazi i-GC hplc vial ye-vial septa Cofa apha ukwazi

Ungcoliseko lwengcoliseko kunye neempazamo zohlalutyo

Ukungalungisi kungekuphela nje kubahlalukweni ekujoliswe kulo kodwa kunokuzisa ungcoliseko lwangaphandle. Umzekelo, ii-victions ngexesha lokuhamba zinokukhulula i-vial caps, ezikhokelela ekungcoliseni ezinqamlezileyo phakathi kweesampulu ezikufuphi kunye nokuchaphazela iziphumo ze-GC-ms.

II. Izisombululo ezintathu zobugcisa zokuzipha ezonwabisayo

Isisombululo 1:I-PHE-STFE PTFE \ / I-Silicone ye-septa
Izibonelelo zobugcisa:
I-ptfe (i-polytetrafluoroothyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyychone
Umaleko we-silicone ubonelela nge-sushiosting ye-elastic, ukwahlukaniso lobushushu.

Uyilo lwangaphambi kokulo lwel lusenisa umngcipheko wokuhluthwa komgangatho ngexesha lokungena kwenaliti.

Ngaba ufuna ukwazi ukuba ukhetha njani iSepta ngaphambili okanye hayi?Cofa apha ukwazi

Imeko esebenzayo: Uhlalutyo lweVOCS ngokwe-EPA 8260, HJ 644-2013, kunye nemigangatho efanayo.

Isisombululo 2: I-Topper

Ixabiso eliphambili:
- Ilawula ngokuchanekileyo uxinzelelo lokutywina
- Iqinisekisa unxibelelwano olufanayo phakathi kwe-cap kunye ne-gasket, ukuthintela ukuvuza ngexesha lokugcina ixesha elide.

Isisombululo 3:I-vials yesampulu iyathobela imigangatho ye-EPA 8260

Iikhrayitheriya zokukhetha:
- Ukungqinelana okuphezulu kwimilinganiselo yomlomo ye-val (E.G.,I-40ml yabanzi yomlomo).
- Izinto zeglasi kufuneka zine-acid kunye ne-alkali-enganyangekiyo kunye ne-leachanses ephantsi.
- Ehamba neSepta eqinisekisiweyo, eqinisekiswe ngovavanyo olungenanto.

III. Imeko yokufunda: Ifuthe lolungelelwaniso lokutywina kulwazi lokuhlaziya

I-laboratri yovavanyo lwendalo esingqongileyo kuthelekiswa nokusebenza phakathi kwee-vials ze-screw-cap kunye nezisombululo ezifanelekileyo:

Imephu yohlalutyo	Imilinganiselo ye-screw-cap vials	Ptfe \ / isiliki septa + i-torque capper
Iqondo lokubuyisela kwakhona i-Bezene	68%	98%
I-Xylene RSD (%)	15.2	4.7
I-Post-Trat-Traction Leak	22%	0%

Isifundo sabonisa ukuba ukumiliselwa kwe-Septa ye-Septa kunye nokuSebenza ngokuDibaniswa koVavanyo lweNgxowa-mali ye-VOCS (

Iv. Ukuqukumbela kunye neengcebiso

Ukungalungisi kwiisampulu zeVOCs akuyongxaki-bachaphazela ngokuthe ngqo ubunyani kunye nokunyaniseka kwesayensi kwiingxelo zohlalutyo. Iilebhu kufuneka:

Ukubeka phambili izidlo eziPhakamileyo: Khetha i-PTFE eqinisekisiweyo ptfe \ / isiliki septa kunye nesampulu yomlomo ebanzi.
IINKQUBO ZOKUXELWA NGOKUGQIBELA: Sebenzisa ii-capper ezilawulwa nguTorque-ulawulwa rhoqo kwaye zihlala rhoqo zoxinzelelo.
Ukuphucula ukulawulwa komgangatho: Ukubek'esweni ukusebenza kokutywina ngovavanyo lokubuyiselwa kwe-SPIDED kwaye ubeke endaweni ye-Septad Septad ngokukhawuleza.

Imbono yexesha elizayo: Ngomgangatho owonyukayo kwimigangatho ye-EPA-17 yokuqeqesha, ukwamkelwa kwezixhobo zokuchonga iingqondo kunye neenkqubo zesampulu ezizenzekelayo ziya kuba kwicala elitsha leShishini.

Ngaphambili:

Izicelo ezi-8 ezibalulekileyo kunye namanyathelo okhuseleko kwi-20ml i-20ml ye-villations | Isikhokelo sokukhetha izikhongozeli kwezilingo zerediyo

Okulandelayo:

I-Mass Spectrometry: Imigaqo, izicelo ezinokutsha kunye nezicelo zenguqu kwisayensi yanamhlanje

Izisombululo zezinto ezisebenzayo ze-ortaing (VOCS) zesampulu yokulungisa ukusilela: Izicwangciso eziphambili zokuphucula ukuchaneka kohlalutyo