Upangiri wa Katswiri Wowunikira Zachilengedwe: Kuchokera ku EPA Certification kupita ku PFAS Forensic Analysis

1. Kukhwima kwa Kutsatira: Kodi Chitsimikizo cha EPA Chimatanthauza Chiyani mu Labu Yamakono?

Pakuyesa kwachilengedwe kwapamwamba, "kuyera" ndi mawu achibale omwe palibe katswiri wodziwa kudalira. Kuti tipeze deta yotetezedwa mwalamulo, tiyenera kupitilira ma labware wamba kupita kumalo ovomerezeka ovomerezeka. Koma kodi epa certified imatanthauza chiyani kwa katswiri wa labotale pamzere wakutsogolo?

Chitsimikizo cha EPA si sitampu chabe; ndi njira yokhwima, yolembedwa yochotsa kuipitsidwa. Zimatanthawuza kuti labware yoyeretsedwa kale, makamaka Mbale EPA 40ml ogwiritsidwa ntchito pa volatile organic analysis (VOA), wakhala akutsatiridwa ndi ndondomeko yovomerezeka-nthawi zambiri kutsuka kwa asidi kumatsatiridwa ndi kutentha kwambiri.

Cholinga ndikuyendetsa maziko otsika a ppb pafupi ndi zero monga momwe malamulo afizikiki amaloleza. Mukamagwiritsa ntchito mbale zovomerezeka, sikuti mukungogula galasi; mukugula chitsimikizo kuti kuthamanga kwanu kwa "Blank" sikuwonetsa nsonga za mizukwa. Ngati chidebe chanu chimapereka ngakhale kagawo kakang'ono ka kaboni wa kaboni, kuwunika kwanu konse kwa chilengedwe kumasokonekera, zomwe zimapangitsa kubwereza kokwera mtengo.

2. Mastering Total Organic Carbon (TOC): Kupitirira COD ndi BOD Testing

Mukawunika thanzi lachitsanzo, muyeso wa organic carbon (toc) umayima ngati njira yotsimikizirika kwambiri ya kuipitsidwa ndi organic. Ngakhale COD (kufunidwa kwa okosijeni wamankhwala) ndi BOD (kuyesa kwa BOD) ndi miyeso yokhazikika, ndi miyeso yosadziwika yomwe ili ndi zosokoneza.

Kuyeza kwa TOC, mosiyana, kumapereka chiwerengero chokwanira cha maatomu a carbon. Komabe, kulondola uku kumapangitsa kuti zikhale zovuta kwambiri ku zolakwika zoyambitsidwa ndi dongosolo. Ngati wanu 24-400 magalamu Sali opangidwa ndi kuyera kwambiri, omangika PTFE\/Silicone septa, mumlengalenga CO2 kapena nthunzi za organic zimatha kusamukira mu vial, ndikuwonjezera zotsatira zanu za TOC. M'mayendedwe olondola kwambiri, kusiyana uku ndikofunikira kwambiri pakusankha pakati HPLC vs LCMS kwa matrices ovuta.

3. Vuto la PFAS: Chifukwa Chiyani "PFAS M'mabotolo Amadzi Apulasitiki" Inasintha Malamulo

Gulu lofufuza pakali pano likulimbana ndi vuto la "forever chemicals". Nkhani yapagulu nthawi zambiri imakhazikika pa pfas m'mabotolo amadzi apulasitiki, ndikuwunikira momwe zinthu zopangira fluorinated izi zimachokera ku ma polima kupita kumadzi akumwa. Kwa katswiri wa labu, chodabwitsa ichi ndi chenjezo: pulasitiki ndiye mdani wa kulondola kwa PFAS.

Mukamayang'anira kuchuluka kwa madzi pamwamba pamadzi, kuchuluka kwazomwe zili pamwamba mpaka kuchuluka kwa zotengera zotengera zomwe zimatanthawuza kuti chotengera chilichonse chopangidwa ndi polima chimatha kutsika PFAS kapena kutsatsa analyte pamakoma apulasitiki. Kuti muteteze deta, kusunthira ku magalasi apadera, ovomerezeka a EPA 40ml m'mbale sikungakambirane. Kusanthula kwa PFAS kumafuna njira ya "zero-kulolerana" pakuyipitsa, pomwe gawo lililonse, kuphatikiza maginito screw caps zogwiritsidwa ntchito pamapulatifomu ongochita zokha, ziyenera kukhala zaulere za PFAS.

4. Sayansi Yazinthu: Kupanga Njira Yotsiriza Yoyenda

Kuti apereke maziko otsika a ppb, chigawo chilichonse chiyenera kupirira zosungunulira zaukali komanso kutentha kwambiri.

• Septa Shield: Septa yathu imakhala ndi PTFE yapamwamba kwambiri. Timapewa zomatira zonse mu msonkhano wathu 9mm zipewa zazifupi za ulusi , pogwiritsa ntchito njira yolumikizirana yomwe imachotsa phokoso lakumbuyo kwa VOC.

• Ma Coefficients Okulitsa: Pogwiritsa ntchito galasi la USP Type I, timatsimikizira kukhazikika kwa kutentha. Galasi ili silingaphwanyike pakasinthasintha kutentha komwe kumafunikira pamakina oyezera a TOC.
  
  

5. Laboratory Economics: Kupewa "Rerun Tax"

M'dziko lowunikira zachilengedwe, vial yotsika mtengo kwambiri ndi yomwe imagwira ntchito koyamba. Ngati musunga $ 0.10 pa vial yosatsimikiziridwa koma kutaya chitsanzo cha $ 500 chifukwa cha spike yowonongeka, mwasankha bwino zachuma.

Pamaso chitsanzo ngakhale kufika vial, kuonetsetsa bwino kusefera ndi Zosefera za syringe zapadziko lonse ndikofunikira kuteteza gawo lanu ndi deta. Kuyika ndalama mu hardware yabwino ndiyo njira yokhayo yothetsera "Rerun Tax."

6. Mafunso Ofunsidwa Katswiri: Kuyenda Miyezo Yachilengedwe

• Q: Chifukwa chiyani TOC imakondedwa kuposa COD ndi BOD pamtundu wamadzi apamtunda?

  • A: Total organic carbon (toc) imapereka kuchuluka kwachangu komanso kolunjika kwambiri. Mosiyana ndi kufunikira kwa okosijeni wamankhwala a COD, TOC simakhudzidwa ndi mchere, ndikupangitsa kuti ikhale yodalirika pakuwunika kwanthawi yayitali pamwamba pamadzi.

• Q: Kodi ndingagwiritsenso ntchito Mbale zanga za EPA 40ml?

  • A: Powunikira akatswiri, kugwiritsanso ntchito sikuloledwa. Chiwopsezo choyipitsidwa - makamaka ndi "mankhwala osatha" ngati PFAS - ndichokwera kwambiri. Kuwasintha ndi atsopano Mbale EPA 40ml ndi mtengo wocheperako poyerekeza ndi kafukufuku wolephera kutsatira.