Ikibazo cyihishe mubikinisho
Chromium nicyuma gitandukanye, ibisanzwe muri byo ni Cr (III) na Cr (VI).Muri byo, uburozi bwa Cr (VI) bukubye inshuro zirenga 100 ubwa Cr (III), bufite ingaruka nini cyane z'uburozi ku bantu, ku nyamaswa no ku binyabuzima byo mu mazi.Yashyizwe ku rutonde rwa kanseri ya kanseri n’ikigo mpuzamahanga gishinzwe ubushakashatsi kuri kanseri (IARC).Ariko abantu benshi ntibazi ko hari ikibazo cya Cr (VI) ikabije mubikinisho byabana!
Cr (VI) biroroshye cyane kwinjizwa numubiri wumuntu.Irashobora kwibasira umubiri wumuntu binyuze mu igogora, inzira zubuhumekero, uruhu nuruhu.Byatangajwe ko iyo abantu bahumeka umwuka urimo ubukana butandukanye bwa Cr (VI), bazagira ibyiciro bitandukanye byo gutontoma, atrophy ya mucosa yizuru, ndetse no gutobora izuru rya septum na bronchiectasis.Irashobora gutera kuruka no kubabara munda.Dermatitis na eczema birashobora kubaho mugutera uruhu.Ibyangiza cyane ni igihe kirekire cyangwa igihe gito cyangwa guhumeka ibyago bya kanseri.
Muri Mata 2019, Komite y’Uburayi ishinzwe ubuziranenge （CEN） yasohoye igipimo cy’umutekano w’igikinisho EN71 Igice cya 3: kwimuka kwibintu byihariye (verisiyo ya 2019).Muri byo, ibikosowe bya Cr (VI) gutahura ni:
Value agaciro ntarengwa ka Cr (VI) k'ubwoko bwa gatatu bw'ibikoresho, yahinduwe kuva 0.2mg / kg igera kuri 0.053mg / kg, guhera ku ya 18 Ugushyingo 2019.
Method uburyo bwo gukora ikizamini cya Cr (VI) bwaravuguruwe, kandi uburyo bwavuguruwe bushobora kuba burimo imipaka yibyiciro byose byibikoresho.Uburyo bwikizamini bwahinduwe kuva LC-ICPMS buhinduka IC-ICPMS.
SHINE ibisubizo byumwuga
Dukurikije ibipimo bya EN71-3: 2019 by’ubumwe bw’ibihugu by’Uburayi, gutandukanya no gutahura Cr (III) na Cr (VI) mu bikinisho bishobora kugerwaho ukoresheje chromatografi ya SINE CIC-D120 na plasma ya NCS plasma MS 300 ihujwe na plasma mass spectrometer.Igihe cyo gutahura kiri mumasegonda 120, kandi umurongo ugereranije ni mwiza.Mugihe cyo gutera inshinge Cr (III) na Cr (VI), imipaka yo gutahura ni 5ng / L na 6ng / L, kandi ibyiyumvo byujuje ibyangombwa bisabwa kugirango umuntu amenye.
1. Ibikoresho
2. Imiterere yo gutahura
Imiterere ya chromatograf
Icyiciro cya mobile: 70 mM NH4NO3, 0,6 mM EDTA (2Na), pH 71, Uburyo bwo Kwikuramo: Gukuraho Isometric
Igipimo cyo gutemba (mL / min): 1.0
Ingano yo gutera inshinge (µL): 200
Inkingi: AG 7
Imiterere ya ICP-MS
Imbaraga za RF (W): 1380
Gazi itwara (L / min): 0.97
Isesengura rusange: 52C
Umuvuduko mwinshi (V): 2860
Igihe rimara: 150
3. Reagents nibisubizo bisanzwe
Cr (III) na Cr (VI) igisubizo gisanzwe: ubucuruzi buboneka byemewe byemewe
Ammonia yibanze: isukuye neza
Acide yibanze ya nitricike: isuku irenze
EDTA-2Na: ubuziranenge burenze
Amazi meza cyane: kurwanya ≥ 18.25 m Ω · cm (25 ℃).
Gutegura umurongo wa Cr (VI) ukora: kuvanga Cr (VI) igisubizo gisanzwe hamwe namazi meza cyane kugirango akoreshwe intambwe ku yindi.
Gutegura Cr (III) na Cr (VI) bivanze igisubizo gikora umurongo: fata umubare runaka wa Cr (III) na Cr (VI) igisubizo gisanzwe, ongeramo 10mL ya 40mM EDTA-2Na mumashanyarazi ya 50mL, uhindure agaciro ka pH kugeza kuri 7.1, shyushya mu bwogero bwamazi kuri 70 ℃ kuri 15min, ukosore amajwi, hanyuma ukore igisubizo gisanzwe kivanze hamwe nibisabwa bikenewe muburyo bumwe.
4. Ibisubizo
Ukurikije uburyo bwageragejwe bwa EN71-3, Cr (III) yari igizwe na EDTA-2Na, hanyuma Cr (III) na Cr (VI) baratandukana neza.Chromatogramu yicyitegererezo nyuma yisubiramo inshuro eshatu yerekanaga ko imyororokere yari myiza, kandi ugereranije ugereranije gutandukana (RSD) agace ka mpinga kari munsi ya 3% .Imipaka yo gutahura yagenwe nubushakashatsi bwa S / N> 3.Umupaka wo gutahura wari 6ng / L.
Gutandukanya inshinge chromatogramu ya Cr (III) - EDTA na Cr (VI) igisubizo kivanze
Chromatogramu yuzuye ibizamini bitatu byo guterwa 0.1ug / L Cr (III) -EDTA na Cr (VI) bivanze bivanze (Stabilite ya 0.1ppbCr (III) + Cr (VI) icyitegererezo)
0.005-1.000 ug / L Cr (III) kalibrasi yo gutandukanya (Peak area linearity) sample)
0.005-1.000 ug / L Cr (VI) kalibrasi yo kugabanuka (Impinga yuburebure bwo hejuru) ea umurongo) icyitegererezo)
Igihe cyo kohereza: Apr-18-2023