Qalalaasaha qarsoon ee alaabta lagu ciyaaro
Chromium waa bir kala duwan, kuwa ugu caansan waa Cr (III) iyo Cr (VI).Waxaa ka mid ah sunta Cr (VI) waxay 100 jeer ka badan tahay Cr (III), taasoo saameyn aad u weyn ku leh dadka, xayawaanka iyo noolaha biyaha.Waxa ay hay'adda caalamiga ah ee cilmi-baadhista kansarka (IARC) u taxay sida fasalka I kansarka.Laakin dad badan ma oga in ay jirto dhibaato xad dhaaf ah oo Cr (VI) ah oo ku jirta alaabta ay caruurtu ku ciyaaraan!
Cr (VI) aad bay u fududahay in jidhka bini'aadamku nuugo.Waxay ku soo duuli kartaa jidhka bini'aadamka iyada oo loo marayo dheefshiidka, mareenka neef-mareenka, maqaarka iyo xuubabka.Waxaa la soo wariyay in marka dadku neefsadaan hawo ka kooban xaddi kala duwan oo Cr (VI), waxay yeelan doonaan heerar xabeeb ah oo kala duwan, atrophy xuubka sanka, iyo xitaa daloolin septum sanka iyo boronkiitada.Waxay keeni kartaa matag iyo calool xanuun.Dermatitis iyo cambaartu waxay ku dhici kartaa maqaarka maqaarka.Khatarta ugu badan waa soo-gaadhista muddada-dheer ama muddada-gaaban ama neefsashada khatarta kansarka.
Bishii Abriil 2019, Guddiga Yurub ee Habaynta (CEN) waxay soo saartay heerka badbaadada toy EN71 Qaybta 3: guuritaanka walxaha gaarka ah (nooca 2019).Waxaa ka mid ah, nuxurka dib loo eegay ee Cr(VI) ogaanshaha waa:
● Xadka qiimaha Cr (VI) ee walaxda saddexaad, laga beddelay 0.2mg/kg oo loo beddelay 0.053mg/kg, oo dhaqangal ah Noofambar 18, 2019.
● Habka tijaabada ee Cr (VI) ayaa dib loo eegay, habka dib loo eegayna waxa uu hore u ahaan karaa xadka dhammaan qaybaha agabka.Habka tijaabada ayaa laga beddelay LC-ICPMS oo loo beddelay IC-ICPMS.
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Marka loo eego heerka EN71-3: 2019 ee Midowga Yurub, kala-soocidda iyo ogaanshaha Cr (III) iyo Cr (VI) ee alaabta lagu ciyaaro waxaa lagu xaqiijin karaa iyadoo la adeegsanayo SINE CIC-D120 ion chromatograph iyo NCS plasma MS 300 inductively la isku daray balaasmaha mass spectrometer.Waqtiga ogaanshaha waa 120 ilbiriqsi gudahood, xiriirka toosanna waa wanaagsan yahay.Marka la eego xaaladda cirbadeynta Cr (III) iyo Cr (VI), xaddidaadaha ogaanshaha waa 5ng / L iyo 6ng / L siday u kala horreeyaan, iyo dareenka ayaa la kulma shuruudaha xadka ogaanshaha caadiga ah.
1. Qalabaynta qalabka
2. Xaaladaha ogaanshaha
Xaaladda chromatograph ion
Marxaladda mobilada: 70 mM NH4NO3, 0.6 mM EDTA(2Na), pH 71, Habka Elution: Isometric elution
Heerka socodka (ml/min): 1.0
Mugga duritaanka (µL):200
Tiirka: AG 7
Xaaladda ICP-MS
Awoodda RF (W): 1380
Gaasta qaada (L/min) :0.97
Tirada guud ee falanqaynta:52C
Koronto-badane (V): 2860
Muddada (s): 150
3. Reagents iyo xalalka caadiga ah
Cr (III) iyo Cr (VI) xalalka caadiga ah: xal caadi ah oo la shahaadeysan oo ganacsi ahaan la heli karo
Ammonia xoog leh: saafi ka sarreeya
Nitric acid: nadiifnimo sare
EDTA-2Na: daahirnimo sare
Biyo saafi ah oo aad u sarreeya: iska caabin ≥ 18.25 m Ω · cm (25 ℃).
Diyaarinta qalooca shaqada ee Cr (VI): ku milmi Cr (VI) xal caadi ah oo leh biyo saafi ah oo tallaabo tallaabo tallaabo ah oo loo baahan yahay.
Diyaarinta Cr (III) iyo Cr (VI) xal isku dhafan oo qalooca shaqeeya: qaado qaddar cayiman oo Cr (III) iyo Cr (VI) xal caadi ah, ku dar 10ml 40mM EDTA-2Na galaas mugga 50mL, hagaaji qiimaha pH ilaa 7.1, kuleyli biyaha qubeyska 70 ℃ 15min, hagaaji mugga, oo samee xalalka isku dhafan ee caadiga ah oo leh feejignaanta loo baahan yahay qaab isku mid ah.
4. Natiijada ogaanshaha
Iyadoo la raacayo habka tijaabada ah ee lagu taliyey ee EN71-3, Cr (III) waxaa lagu kariyey EDTA-2Na, iyo Cr (III) iyo Cr (VI) ayaa si wax ku ool ah loo kala saaray.chromatogram-ka muunada ka dib saddex ku celcelin ayaa muujisay in dib u soo saariddu ay wanaagsan tahay, iyo jaangooyada heerka qaraabo (RSD) ee meesha ugu sarreysa waxay ka yaraatay 3%. Xadka ogaanshaha waxaa lagu go'aamiyay xoojinta S/N>3.Xadka ogaanshaha wuxuu ahaa 6ng/L.
Kala soocida chromatogram ee Cr (III) - EDTA iyo Cr (VI) xal isku dhafan
Chromatogram-ku-kordhinta saddex tijaabo oo cirbad ah oo ah 0.1ug/L Cr (III) -EDTA iyo Cr(VI) xal isku dhafan (Xasilloonida 0.1ppbCr (III) + Cr (VI) muunad)
0.005-1.000 ug/L Cr (III) qalooca cabbirka (khadka ugu sarreeya) muunad)
0.005-1.000 ug/L Cr (VI) qalooca cabbirka (khadka dhererka sare)
Waqtiga boostada: Abriil-18-2023