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I-HOD ePhezulu eliPhezulu le-CoD

I-Aijiren Flat-Botts-Botts i-EPA ifumaneka ngobukhulu abangama-20, 40, kunye ne-60ml ubukhulu, efanelekileyo yamanzi okanye amanzi omhlaba. Zenziwe (zinikezelwe) chest forest chemu i-borosililicate iglasi, nokuba icocekile ...
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Ukuvavanywa kwemfuno yeoksijini (CoD) kubalulekile ekuvavanyeni umgangatho wamanzi, ngakumbi kulawulo lwamanzi amdaka kunye nokuhlolwa kwendalo. Iityhubhu ze-COD zizinto ezikhethekileyo zelebhu ezenzelwe ukuqhuba kakuhle ukulinganisa ngokuchanekileyo kwe-organic ingcoliseko yamanzi kwiisampulu zamanzi. Nantsi into ekufuneka uyazi ngezixhobo ezibalulekileyo:

1️⃣ Iindidi zeetyhubhu ze-COD

Iityhubhu ze-COD ziza kuYilo olwahlukeneyo, kubandakanya:

  • Iityhubhu zangaphambiEzi tyhubhu ziqukethe i-redagents eyimfuneko kunye ne-catalysts, yenza lula inkqubo yokulungiselela isampulu. Umzekelo, i-lovibond® ibonelela nge-CoD vebe ye-COD ye-VLR elinganisa amanqanaba e-COD ukusuka kwi-2-60 mg \ / l, ibenza balungele uvavanyo olukhawulezileyo.
  • Iityhubhu zenkcubeko yeglasi: Ngokwenziwe kwiglasi ephezulu ye-borosilicate, ezi tyhubhu zenzelwe ukumelana namaqondo obushushu aphezulu kwiinkqubo zokugaya. Bahlala beza ne-Polyproplene Caps ifakwe kwi-ptfe ukuqinisekisa ukutywina okukhuselekileyo kunye nokuthintela ungcoliseko.

2️⃣ Uluhlu lokuhlalutya

Iityhubhu ezahlukeneyo ze-COD zilungelelaniswe ranges ezithile zohlalutyo. Umzekelo, ezinye iityhubhu zenzelwe ukugxininisa kwe-5-150 PPM) ngelixa abanye benokuphatha i-ranges ephezulu (20-1500 PPM). Okuhluziweyo kuvumela iilebhu zokukhetha ityhubhu efanelekileyo ngokusekwe kwiimfuno zabo zovavanyo.

3️⃣ Ukunciphisa ukusetyenziswa

Iityhubhu ezininzi ze-COD zenzelwe ukuhambelana nezixhobo zelebhu zelebhu ezifana nebhloko ye-biesters kunye nee-spectrameters. Oku kujongwa ngemvume yokungqinelana kunye nokuphucula ukusebenza kweenkqubo zovavanyo. Iinketho zangaphambi kweSepta zikwaququzelela ukungena kube lula ukufumana i-Innelitions xa usebenzisa i-autosamplers.

4️⃣ Izicelo

Iityhubhu ze-COD zisetyenziswa ngokubanzi kwizicelo ezahlukeneyo, kubandakanya:

  • Unyango lwamanzi amdaka: Ukubeka iliso ekusebenzeni kweenkqubo zonyango ngokulinganisa umthwalo wezinto eziphilayo.
  • Ukuvavanywa kokusingqongileyo: Ukuvavanya ifuthe lokungcolisa kwimizimba yamanzi.
  • Iinkqubo zemizi-mvelisoUkuqinisekisa ukuthotyelwa kwemigaqo yokusingqongileyo ngokubeka iliso kumgangatho wezinto ezinamafutha.
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