EN ISO 17075-1:2017 PDF

Leather - Chemical determination of chromium(VI) content in leather - Part 1: Colorimetric method (ISO 17075-1:2017)

Title (English):

EN ISO 17075-1:2017

Leather - Chemical determination of chromium(VI) content in leather - Part 1: Colorimetric method (ISO 17075-1:2017)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 18
Publication date:: February 15, 2017
Edition:: CEN EN 17075 edition 2 version 1
ICS:: 59.140.30

Document language:

enru

Delivery time:1–7 days

Price:66 €

Description (English):

ISO 17075-1:2017 specifies a method for determining chromium(VI) in solutions leached from leather under defined conditions. The method described is suitable to quantify the chromium(VI) content in leathers down to 3 mg/kg. ISO 17075-1:2017 is applicable to all leather types. The results obtained from this method are strictly dependent on the extraction conditions. Results obtained by using other extraction procedures (extraction solution, pH, extraction time, etc.) are not comparable with the results produced by the procedure described in this document. If a leather sample is tested with both this document and ISO 17075-2, the results obtained with ISO 17075-2 are considered as the reference. The advantage of the method described in ISO 17075-2 is that there are no interferences from the colour of the extract. Nevertheless, interlaboratory trials do not show significant differences (see Annex C) and the results are comparable between both methods.

Technical details

Technical committee: CEN/TC 289 - Leather
SKU: EN ISO 17075-1:2017

Abstract

Overview

EN ISO 17075-1:2017 - "Leather - Chemical determination of chromium(VI) content in leather - Part 1: Colorimetric method" - is a CEN-endorsed ISO standard that specifies a laboratory method to determine extractable chromium(VI) (hexavalent chromium) from leather. The method uses a phosphate-buffered extraction (pH 7.0–8.0) and a colorimetric reaction with 1,5‑diphenylcarbazide, producing a red/violet complex measured photometrically at 540 nm. It is applicable to all leather types and can quantify chromium(VI) down to 3 mg/kg (expressed on the dry mass of the sample).

Key Topics

Scope and applicability
- Measurement of extractable chromium(VI) from leather under defined extraction conditions.
- Applicable to all leather types; results are strictly dependent on following the specified extraction procedure.
Analytical principle
- Leaching in phosphate buffer (pH 7.0–8.0), optional removal of coloured co‑extractives via solid phase extraction (SPE), oxidation of 1,5‑diphenylcarbazide to produce a measurable complex at 540 nm.
Detection limit
- Method suitable to quantify chromium(VI) content down to 3 mg/kg.
Reagents and equipment
- Key reagents include dipotassium hydrogenphosphate buffer, 1,5‑diphenylcarbazide (DPC), and potassium dichromate standards.
- Typical lab equipment: mechanical orbital shaker, photometer/spectrophotometer, SPE material (if required), oxygen‑free degassing (argon or nitrogen).
Result comparability
- Results depend on extraction solution, pH, extraction time and other procedural details; results obtained with different extraction procedures are not comparable.
- When both methods are applied, ISO 17075-2 (ion chromatography) is considered the reference method; however, interlaboratory comparisons show both methods yield comparable results (see Annex C).

Applications

Laboratory testing and quality control for leather manufacturers and tanneries to monitor hexavalent chromium levels in finished leather.
Regulatory compliance and product safety verification where chromium(VI) limits are enforced by legislation or customer requirements.
Incoming raw-material screening and supplier qualification to reduce chemical risk and ensure safer leather products.
Retailers and brands can use test results to support declarations and reduce exposure risk to consumers and workers.

Who uses this standard

Accredited testing laboratories
Leather manufacturers and tanneries
Product safety and compliance teams
Regulatory authorities and certification bodies
R&D and quality assurance groups in the leather supply chain

Related standards

ISO 17075-2 - Chromium(VI) in leather: ionic chromatography method (reference where both methods used).
Normative references cited in EN ISO 17075-1: ISO 2418, ISO 3696, ISO 4044, ISO 4684.

Keywords: EN ISO 17075-1:2017, chromium(VI) in leather, hexavalent chromium test, colorimetric method, leather testing standard, ISO 17075-2, leather quality control.

Related standards

Standards mentioned in the description

Abstract

Overview

Key Topics

Scope and applicability
- Measurement of extractable chromium(VI) from leather under defined extraction conditions.
- Applicable to all leather types; results are strictly dependent on following the specified extraction procedure.
Analytical principle
- Leaching in phosphate buffer (pH 7.0–8.0), optional removal of coloured co‑extractives via solid phase extraction (SPE), oxidation of 1,5‑diphenylcarbazide to produce a measurable complex at 540 nm.
Detection limit
- Method suitable to quantify chromium(VI) content down to 3 mg/kg.
Reagents and equipment
- Key reagents include dipotassium hydrogenphosphate buffer, 1,5‑diphenylcarbazide (DPC), and potassium dichromate standards.
- Typical lab equipment: mechanical orbital shaker, photometer/spectrophotometer, SPE material (if required), oxygen‑free degassing (argon or nitrogen).
Result comparability
- Results depend on extraction solution, pH, extraction time and other procedural details; results obtained with different extraction procedures are not comparable.
- When both methods are applied, ISO 17075-2 (ion chromatography) is considered the reference method; however, interlaboratory comparisons show both methods yield comparable results (see Annex C).

Applications

Laboratory testing and quality control for leather manufacturers and tanneries to monitor hexavalent chromium levels in finished leather.
Regulatory compliance and product safety verification where chromium(VI) limits are enforced by legislation or customer requirements.
Incoming raw-material screening and supplier qualification to reduce chemical risk and ensure safer leather products.
Retailers and brands can use test results to support declarations and reduce exposure risk to consumers and workers.

Who uses this standard

Accredited testing laboratories
Leather manufacturers and tanneries
Product safety and compliance teams
Regulatory authorities and certification bodies
R&D and quality assurance groups in the leather supply chain

Related standards

ISO 17075-2 - Chromium(VI) in leather: ionic chromatography method (reference where both methods used).
Normative references cited in EN ISO 17075-1: ISO 2418, ISO 3696, ISO 4044, ISO 4684.

Keywords: EN ISO 17075-1:2017, chromium(VI) in leather, hexavalent chromium test, colorimetric method, leather testing standard, ISO 17075-2, leather quality control.

EN ISO 17075-1:2017 PDF

Technical details

Abstract

Overview

Key Topics

Applications

Who uses this standard

Related standards

Related standards

Abstract

Overview

Key Topics

Applications

Who uses this standard

Related standards

Related standards

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