isiZulu
Kwadalwa ngo Ngokwamukisa

Indlela Yokukhipha Ukuphazamiseka Kwe-VOC & Phthalate Blank Interference Ekuhlolweni Kwamanzi Kwe-EPA 524／624

Emalabhorethri okuhlola ezemvelo asebenza ngama-Volatile Organic Compounds (VOCs) ancane ngokusebenzisa i-Purge-and-Trap GC-MS (njenge-EPA Methods 524.2, 524.3, 624.1, kanye ne-8260D), ukungcola kwe-method blank kuyimbangela enkulu yokwehluleka kwama-Quality Control (QC) batches. Ama-vials angu-40 mL VOA (Volatile Organic Analysis) angabizi noma angaqinisekisiwe avame ukukhipha i-benzene, i-toluene, ama-xylenes (BTEX), noma ama-phthalate plasticizers, ephakamisa imikhawulo yokutholwa kwendlela futhi ebangela ukuphindwa kwe-batch.
Izitsha ze-VOA ezingama-40 mL zokuhlola amanzi okulandela imikhondo ye-VOC nge-purge-and-trap GC-MS elabhorethri yezemvelo

Okubalulekile Okutholakele

  • Imbangela Eyinhloko Yokwehluleka Kwe-QC Blank:
  • Izindinganiso ze-EPA Protocol: I-EPA Protocol B
  • Isixazululo Esiphelele: ama-vials angu-40 mL VOA ahlanzekile aqinisekisiwe kanye nama-septa angu-0.125" (3.18 mm) e-PTFE/Silicone amsulwa

Imithombo Ejwayelekile Yezinto Ezingemuva Kuma-Vials angu-40 mL VOA

I-Low-Grade Liner/Ukupakisha ➔ Ukuchithwa kwe-Plasticizer ne-Hydrocarbon ➔ I-Purge-and-Trap Preconcentration ➔ ama-ion aphakeme e-m/z 77, 91, 149 ➔ Ukwehluleka kwe-QC Blank kanye nokuphinda kuthathwe amasampula yikhasimende
Indlela izinto ezingemuva ezinjenge-phthalate ne-BTEX eziphuma ezinsikeni ze-VOA ezingena emasampula ezibangela ukuphazamiseka kwe-blank ku-GC-MS
  1. Ukungcola kwe-Phthalate (149):
  2. Ukugcinwa kwe-Septum Solvent (77, 91, 106):
  3. Ubukhulu be-Septum obungafanele kanye nokukhipha umgogodla: 0.125"

Ukuqhathanisa kwekhwalithi: Amabhodlela ajwayelekile vs. Amabhodlela e-CHANCEPRO Certified EPA VOA

Ipharamitha
Amabhodlela ajwayelekile / anezindleko eziphansi angu-40 mL
Amabhodlela e-CHANCEPRO Certified Pre-Cleaned EPA VOA
Izinga lokuhlanza
Ukuhlanza okuyisisekelo / Akunasiqinisekiso
I-EPA Protocol B (ukugezwa nge-asidi, ukugezwa nge-DI, ukubhakwa ngo-400°C)
Ukucaciswa kwe-Septum
i-silicone yezentengiselwano engu-0.060" – 0.090"
0.125" (3.18 mm) I-PTFE/Silicone yezokwelapha enokuqina okuphezulu
Ukunamathela kwe-Liner
Ukunamathiselwa ngengcubo (ingozi ye-organic solvent)
Ukufakwa kwezingqimba ezimbili okungenangcubo ngokuphelele / Ukufakwa okuzwakalayo
Ukulandelela i-VOC yangemuva
Imvamisa iqukethe
i-BTEX/Phthalates
< Umkhawulo wokutholwa kwendlela (MDL < 0.05
)
Imibhalo
Incwadi ejwayelekile yokuvumelana
Isitifiketi sokuhlaziywa kwe-GC-MS ne-TOC esiqondene neqoqo (CoA)
Indawo yokupakisha
Ibhokisi elijwayelekile lokugcina impahla
Iphakethe le-Cleanroom elivalwe ngomoya eline-Class 10,000
Ukuqhathanisa izitsha ze-VOA ezingama-40 mL ezijwayelekile ezingabizi kakhulu nezingama-CHANCEPRO eziqinisekisiwe ezihlanziwe ngaphambilini ze-EPA VOA

Izinqubo ezi-4 zokuvimbela imiphumela engamanga emaqoqweni e-Trace VOC

  1. Qinisekisa ama-CoA aqondene neqoqo ngaphambi kokusebenzisa:
  2. Umthetho wokuthatha isampula ongenayo i-Headspace:
  3. Sebenzisa ama-Liner angu-0.125" e-PTFE ahlanzekile:
  4. Sebenzisa Ama-Trip & Field Blanks azinikele:

Izixazululo ze-CHANCEPRO eziqinisekisiwe ze-EPA/VOA Sampling

Kuklanyelwe ukuhlangabezana nezidingo zokuthobela imithetho zeziphathimandla zikamasipala ezinomthamo ophezulu wamanzi, amalabhorethri ezemvelo ezohwebo, kanye nezicelo zokuhlola ezemvelo:
  • Amabhodlela e-VOA aqinisekisiwe angu-40 mL e-Borosilicate acwebile noma ansundu (ukuqeda kwe-24-400):
  • Ama-Septa e-PTFE/Silicone anamandla angu-0.125":
  • Imibhalo eqondene neqoqo: ukungenelela kwangemuva okungaziro

Thintana nathi

Ukuhlanganisa Ubusha, Ukusebenzisa Izitayela.

Ngokubhalisa incwadi yethu yezindaba, uyavuma neMigomo Yethu Yesevisi kanye neNqubomgomo Yobumfihlo.

Xhumana Nathi