紡織品中甲醛測量ppt課件-文庫吧資料
2025-05-09 01:34本頁面
【正文】 PT seminar, Guimaraes, November 2022 Release of formaldehyde from the textile substrate can be measured by: STANDARD TEST METHODS ?Japan Law 112 (EN ISO 141841) ?AATCC112 The formaldehyde content below 20 mg/kg can not be shown to be caused by the formaldehyde which was released by the crosslinking reagent. ALTERNATIVE TEST METHODS ?edana remended test method using HPLC ?HPLC ITSAPT seminar, Guimaraes, November 2022 EN ISO 141841 standard test method Standard solutions of formaldehyde with concentration levels of , , , , , and mg/L in the 3,5, diacetyl –1,4dihydrolutidin forms were prepared. The formaldehyde derivative solutions were prepared in water and in matrix (extract from untreated cotton fibers). Six replicates of each concentration level were prepared From the textile substrateformaldehyde was extracted with water at 40?C, filtered and then converted by using acetylacetone reagent to yellow colored pound COCH3C H2COCH3+COHHNHHHCH2COCOC H3C H3COCH3C H2CCNCCHCH3COC H3C H3ITSAPT seminar, Guimaraes, November 2022 Validation of absorbance measurements on UV/Vis ? With Grubbs and Beck statistical test were shown that there were no aberrant values ? An F – test was applied to check heteroscedasticity: standard deviation increase with the concentration ? Correlation coefficient for standard water and matrix solutions was greater than ? Quality coefficient (QC) was lower than permitted 5% ? Anova test shows that the experimental error was smaller than lack of fit (LOF) for the linear calibration curve ? Precision of standard water and matrix solutions was better than 10% ? The limit of detection (LOD) was mg/l ? The limit of quantification (LOQ) was mg/l ? The amount of formaldehyde extracted for each sample can be calculated by: Konc (x) = 7,493 ABS 0,06356 ITSAPT seminar, Guimaraes, November 2022 Free formaldehyde measured by HPLC ? Standard water and matrix solutions of formaldehyde with concentrations levels , , , , , , , and mg/L in the 3,5, diacetyl –1,4dihydrolutidin forms were prepared ? Formaldehyde was extracted from textile substrate with water at 40?C, filtered and then converted by using acet
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