Accurate quantification of polyester in textiles through complete depolymerisation and HPLC

Scope

The repository contains the data supporting the publication "Accurate quantification of polyester in textiles through complete depolymerisation and HPLC". The article can be found here.

File description 



HPLC_data.rds (135 kB): R variable export containting the nested dataframe HPLC_data (75 rows) corresponding to the data in Figure 2 (b) and (c). The dataframe contains the following columns:



ID (factor): unique identifier of each sample Examples: '2026.1', '2025.11'.

Group (factor): description of the sample content, by different experimental groups, matching the point shape legend in Figure 2 (b) and (c). Examples: 'Fabric', 'PET fibres'.

Fabric (factor): identifier of the fabric from which the sample was cut (if Group == 'Fabric'; else: NA). The key is included in Fabric_key.pdf. Exaples: '21', '41'

Second_component: for samples contatining two types of references fibres (PET + another), description of the non-PET one (if Group %in% c('PET and cotton fibres', 'PET and other fibres'); else: NA). Examples: 'Cotton', 'Wool'.      

Chromatogram (dataframe): dataframe with columns:



Time (double): timestamp of the HPLC detector (from the start of the run, in minutes). Chromatograms are truncated at 5 min (before the rinse/requilibration phase shown in Figure 2 (a)). Examples:  0.00000, 0.00833

Intensity (double): corresponding intensity (in arbitrary units) of the HPLC signal, after baseline correction Examples:  0.0461, 5.7237.



Mass_added (double): mass of PET added to the sample in mg. Examples: 2.863, 34.899.

Mass_measured (double): mass of PET estimated via the proposed method in mg. Examples: 3.267, 35.209.

PET_mass_percentage (double): percentage of PET in the sample by mass. For Group == 'Fabric', this is the value on the product label. For Group != 'Fabric', this is the estimate based on Mass_measured. Examples: 28, 35.137.



Example_cal_parameters.rds (0.25 kB): R variable export containing the output of broom::tidy(base::lm(...)) for a typical calibration curve. Concentrations (C) are expressed in mg TA/ml, Areas as AU*min (matching the integration of HPLC_data$Chromatogram over time. The dilution factor of the samples is D = 0.05. 

Fabric_key.pdf (161 kB): single page PDF with the key to match the fabric shown in Table 1 to their entries in HPLC_data.


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