isiZulu
Kwadalwa ngo 09.05

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, ne-8260D), ukungcola kwe-method blank kuyimbangela enkulu yokwehluleka kwama-Quality Control (QC) batches. Ama-vial angu-40 mL VOA (Volatile Organic Analysis) angabizi noma angagunyaziwe 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 umkhondo we-VOC nge-purge-and-trap GC-MS elabhorethri yezemvelo

Okubalulekile Okutholakele

  • Imbangela Eyinhloko Yokwehluleka Kwe-QC Blank:
  • Amazinga E-EPA Protocol: I-EPA Protocol B
  • Isixazululo Esiphelele: ama-vial angu-40 mL VOA ahlanzekile agunyaziwe nama-septa angu-0.125" (3.18 mm) e-PTFE/Silicone amsulwa

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

I-Low-Grade Liner/Ukupakisha ➔ Ukuchithwa kwe-Plasticizer ne-Hydrocarbon ➔ Ukuhlanganiswa kwangaphambili kwe-Purge-and-Trap ➔ ama-ion aphakeme we-m/z 77, 91, 149 ➔ Ukwehluleka kwe-QC Blank kanye nokuphinda kuthathwe amasampula yikhasimende
Indlela izinto ezingemuva ze-phthalate ne-BTEX ezivuzayo kusuka kumalayini ezitsha ze-VOA ziye emasampulini ezibangela ukuphazamiseka kwe-blank ku-GC-MS
  1. Ukungcola kwe-Phthalate (149):
  2. Ukugcinwa kwe-Septum Solvent (77, 91, 106):
  3. Ukungafanele Kobukhulu Be-Septum Nokuklebhula: 0.125"

Ukuqhathanisa Kwekhwalithi: Amabhodlela Avamile vs. Amabhodlela E-EPA VOA Aqinisekisiwe E-CHANCEPRO

Ipharamitha
Amabhodlela Avamile / Omnotho angu-40 mL
Amabhodlela E-EPA VOA Aqinisekisiwe, Ahlanzwe Ngaphambilini E-CHANCEPRO
Izinga Lokuhlanzwa
Ukuhlanza okuyisisekelo / Akunaqinisekiso
I-EPA Protocol B (ukugezwa nge-asidi, ukugezwa nge-DI, ukubhakwa ngo-400°C)
Ukucaciswa kwe-Septum
i-silicone yezohwebo engu-0.060" – 0.090"
I-0.125" (3.18 mm) ye-High-Resilience Medical Grade PTFE/Silicone
Ukunamathela kwe-Liner
Ukunamathiselwa ngengcina (ingozi ye-solvent ephilayo)
Ukufakwa Kwezingqimba Ezimbili Okungenangcina Okungu-100%/Ukufakwa Okuzwakalayo
Umkhondo We-VOC Ongemuva
Ngokuvamile kuqukethe
I-BTEX/Phthalates
< Umkhawulo Wokutholwa Kwendlela (MDL < 0.05
)
Imibhalo
Incwadi ejwayelekile yokuvumelana
Isitifiketi Sokuhlaziywa Kwe-GC-MS & TOC Esiqondene Ngeqoqo (CoA)
Isimo Sokupakisha
Ibhokisi elijwayelekile lokugcina impahla
Iphakethe le-tray elivalwe ngomoya ongenalutho le-Class 10,000 Cleanroom
Ukuqhathanisa izitsha ze-VOA ezijwayelekile ezingama-40 mL zomnotho nezingama-VOA eziqinisekisiwe zika-CHANCEPRO ezihlanziwe ngaphambilini ze-EPA

4 Protocols to Prevent False Positives in Trace VOC Batches

  1. Verify Lot-Specific CoAs Before Use:
  2. Zero Headspace Sampling Rule:
  3. Sebenzisa ama-Liner angu-0.125" e-PTFE emsulwa:
  4. Faka Ama-Trip Blank nama-Field Blank azinikele:

Izixazululo ze-CHANCEPRO eziqinisekisiwe ze-EPA/VOA Sampling

Kuklanyelwe ukuhlangabezana nezidingo zokuthobela iziphathimandla zikamasipala ezinomthamo ophezulu wamanzi, amalabhorethri ezemvelo ezohwebo, kanye nezitender zokuhlola ezemvelo:
  • Ama-VOA Vials aqinisekisiwe angu-40 mL e-Borosilicate acwebile noma ansundu (ukuqedwa kwe-24-400):
  • Ama-Septa anzima angu-0.125" e-PTFE/Silicone:
  • Imibhalo Eqondene Ngeqoqo: ukungenelela kwangemuva okungaziro

Thintana nathi

Ukuhlanganisa Ubusha, Ukusebenzisa Izitayela.

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

Xhumana Nathi