| Titre : |
An improved method for accurately determining total content of four fungicides (TCMTB, OIT, OPP and PCMC) |
| Type de document : |
texte imprimé |
| Auteurs : |
Xuan Lei, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 102-108 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Chimie analytique
Chromatographie en phase liquide à hautes performances
Cuir -- Teneur en fongicides
Cuirs et peaux -- Analyse
Extraction (chimie)
Extraction par solvant
Extraction par ultrasons
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Determination of total contents of four fungicides (TCMTB, OIT, OPP and PCMC) in leather is required by Ecolabels due to health risks. Thus, an improved analytical procedure based on the current Standard ISO 13365-1-2020, was investigated to accurately test the total contents of the four fungicides in leather. It was verified that the ultrasonic assisted acetonitrile extraction described in this Standard is only effective for extracting TCMTB, but inefficient for PCMC, OPP and OIT. The extraction efficiency by acetonitrile was 93% for PCMC, 95% for OPP and 89% for OIT, respectively. Methanol was proven to be an optimal alternative of acetonitrile for sample extraction and presented satisfactory extraction efficiencies (~100%) for eluting the four fungicides at a wide content range (80-470 mg/kg). The detection limits were evaluated and well satisfy the requirement by the Ecolabels. Results of HPLC chromatograms from commercial leather samples demonstrated no obvious matrix interferences from methanol extraction. Series of leather samples from different origins were analyzed. TCMTB was found in 86% and OIT in 30% of the total tested samples, which were higher in content than the allowable limits by Ecolabels. |
| Note de contenu : |
- EXPRIMENTAL : Reagents and materiasl- Apparatus - Sample preparation - Sample extraction - Extraction efficiency - HPLC analysis
- RESULTS AND DISCUSSION : Analysis of fours targets with HPLC - Calibration and detection limits - Sample extraction - Analysis or real samples
- Table 1 : The four fungicides with their names, CAS N° and retention times
- Table 2 : Regression parameters and LODs for the four analytes
- Table 3 : Contents of four fungicides in three positive samples
- Table 4 : Comparison of ACN and MeOH extraction by testing commercial samples |
| DOI : |
https://doi.org/10.34314/jalca.v118i3.6813 |
| En ligne : |
https://drive.google.com/file/d/12_lli9XAcmWARwoBGQdAi2S2mTyws6Im/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39000 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 3 (03/2023) . - p. 102-108
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