ISO 17025 Hexavalent Chromium Testing for Consumer Leather Products

A law firm is seeking an ISO/IEC 17025-accredited laboratory to perform hexavalent chromium (Cr(VI)) testing on an initial batch of approximately 20 consumer leather products, including wallets, belts, steering wheel covers, and similar items. This project supports California Proposition 65 compliance and related legal or regulatory proceedings. Successful completion may lead to recurring monthly or quarterly testing.

Testing Requirements

• Analyte: Hexavalent chromium (Cr(VI)) in leather
• Initial sample quantity: Approximately 20 samples
• Sample preparation: ISO 17075-1:2017, Leather—Chemical determination of chromium(VI) content—Part 1: Colorimetric method, including accelerated aging, or a comparable recognized method
• Detection method: The laboratory may use colorimetric/UV-Vis analysis under ISO 17075-1, LC-MS, or another recognized and scientifically defensible method
• Sensitivity: The laboratory must provide its standard limit of detection (LOD) and limit of quantitation (LOQ) for leather matrices
• Accreditation: The laboratory must hold current ISO/IEC 17025 accreditation that includes hexavalent chromium testing in leather or general Cr(VI) determination within its accredited scope

Laboratories proposing alternative methods should identify the applicable standard, explain method suitability, and describe any differences in sensitivity, cost, or turnaround time.

Required Deliverables

• Certificate of Analysis stating the test method, results, LOD, and LOQ
• Chain-of-custody documentation
• Documentation suitable for legal and regulatory use
• Copy of the laboratory’s current ISO/IEC 17025 accreditation certificate and relevant scope

Information Requested from Laboratories

Please provide:

• Per-sample pricing and any volume discounts for recurring submissions
• Standard turnaround time for approximately 20 samples
• Minimum sample size or weight requirements
• Sample packaging, handling, and shipping instructions
• Available testing methods and their respective LOD/LOQ values
• Capacity to support recurring monthly or quarterly testing

Qualified laboratories should submit a quotation, estimated turnaround time, applicable method information, and accreditation scope documentation.