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Laser induced breakdown spectrometry for quantitative analysis of Cd in artificial sweat leachate of jewellery
Authors: Zvolská Magdalena | Pouzar Miloslav | Černohorský Tomáš | Jarolím Oldřich
Year: 2017
Type of publication: článek v odborném periodiku
Name of source: Scientific Papers of the University of Pardubice, Series A, Faculty of Chemical Technology
Page from-to: 213-224
Titles:
Language Name Abstract Keywords
cze Stanovení Cd ve výluzích šperků v modelovém potu pomocí LIBS Šperky s obsahem Cd byly vyluhovány v modelových roztocích kyselého a alkalického potu. Získané roztoky byly naneseny na pevnou podložku a analyzovány metodou LIBS. Předmětem publikace je popis optimalizace LIBS parametrů a vývoj metodiky pro stanovení Cd v kapalných vzorcích nanesených na pevné podložce a srovnání výsledků navrženého postupu s výsledky klasických roztokových technik jako je ICP OES. LIBS; Cd; šperky; modelový pot
eng Laser induced breakdown spectrometry for quantitative analysis of Cd in artificial sweat leachate of jewellery A new method has been developed for the determination of cadmium in artificial sweat leachate using laser induced breakdown spectrometry (LIBS). Small volume of liquid samples could be applied onto the solid carrier, dried under the IR lamp, and subsequently analysed by the LIBS device. For calibration, two series of standard solutions of artificial sweat were prepared: alkaline (pH 8) and acidic (pH 5.5). The known volumes of the Cd standard (with concentration of 1 ± 0.001g/L) were added into the samples of artificial sweat; calibration standards prepared ranging from 0-40 mg/L for acidic and 0-30 mg/L for alkaline sweat. To optimize the LIBS measurements, the regression parameters (R2, AIC, MEP) were the criteria of choice. For our purposes, three cadmium lines at wavelengths 214.44 nm, 226.50 nm, and 228.80 nm were monitored. In model solutions, the method developed has provided the limits of detection (LODs) of 0.08 mg/L for acidic and of 0.06 mg/L for alkaline sweat. The optimized method could then be used for the determination of Cd in artificial sweat leachates of jewellery samples, when the values obtained were in good agreement with the results from the reference analysis by ICP-OES. The proposed method is fast, simple, and requiring only minimal volume of samples. For analysis of leachate of jewellery, fabrics or products of daily consumption, this approach employing LIBS can be an interesting alternative to commonly used techniques, such as ICP OES or AAS. Laser induced breakdown spectrometry; LIBS; Cd; jewelry; sweat; leachate

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