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ISO/IEC 17025:2017: Ensuring Laboratory Accuracy Through Test Item Identification



In the world of testing and calibration laboratories, accuracy, reliability and standardization are paramount. One critical component ensuring these elements is the ISO/IEC 17025:2017 standard. This standard specifies the general requirements for the competence, impartiality and consistent operation of laboratories. A vital aspect of this standard is the identification of test items. This blog will decode the significance, requirements and best practices associated with test item identification under ISO/IEC 17025:2017, offering insights into how laboratories can comply with these essential guidelines.


Understanding ISO/IEC 17025:2017


ISO/IEC 17025:2017 is the latest version of the international standard that sets out the general requirements for the competence of testing and calibration laboratories. It covers all types of laboratories, including first, second and third-party laboratories. The standard focuses on two main aspects: management requirements and technical requirements. Among the technical requirements, test item identification plays a crucial role in ensuring the traceability and reliability of laboratory results.


The Importance of Test Item Identification


Test item identification is a fundamental process in the laboratory setting, ensuring that each test item (sample) is uniquely and accurately identified throughout the testing process. Proper identification prevents mix-ups, cross-contamination and errors, thereby ensuring the integrity of the test results. This process is critical for maintaining the credibility of the laboratory and the trust of clients and regulatory bodies.


Key Requirements for Test Item Identification

ISO/IEC 17025:2017 outlines several key requirements for the identification of test items:


1. Unique Identification

Each test item must have a unique identifier. This could be a number, code or label that distinctly identifies the item from all others in the laboratory. This unique identification must be traceable to the original request for testing or calibration.


2. Complete Information

The identification system must include sufficient information to ensure that the item can be traced through all stages of testing or calibration. This includes details such as the origin of the item, the condition in which it was received, any special instructions and the date of receipt.


3. Chain of Custody

Maintaining a clear chain of custody is crucial. This means documenting all stages of handling the test item from receipt to disposal. Any transfer of the test item between personnel or departments must be recorded to ensure full traceability.


4. Labelling

Labels on test items should be durable and legible throughout the testing process. The labels should not interfere with the testing process or compromise the integrity of the item.


5. Handling Procedures

Laboratories must establish procedures for the proper handling of test items to avoid contamination, degradation or damage. These procedures should include guidelines for storage, transportation and disposal of test items.


Best Practices for Test Item Identification

To comply with ISO/IEC 17025:2017 and ensure effective test item identification, laboratories can adopt several best practices:


1. Standardized Labelling System

Implement a standardized labelling system that uses barcodes or QR codes for unique identification. This system should be integrated with the laboratory information management system (LIMS) to facilitate easy tracking and retrieval of information.


2. Training and Awareness

Regular training sessions for laboratory personnel on the importance of test item identification and the correct procedures to follow. Ensuring that all staff members are aware of and adhere to these procedures is vital for maintaining consistency and accuracy.


3. Clear Documentation

Maintain comprehensive documentation of all procedures related to test item identification. This includes standard operating procedures (SOPs), checklists and logs that capture all relevant information about the test items.


4. Internal Audits

Conduct regular internal audits to verify compliance with test item identification procedures. These audits help identify any gaps or areas for improvement, ensuring continuous adherence to ISO/IEC 17025:2017 requirements.


5. Quality Control Measures

Implement quality control measures such as duplicate testing, blind samples and proficiency testing to ensure the accuracy and reliability of test results. These measures can help identify any issues related to test item identification early in the process.


Challenges and Solutions

Despite the clear guidelines and best practices, laboratories may face challenges in test item identification. Common challenges include managing large volumes of test items, dealing with degraded or contaminated samples and ensuring consistency across different departments or personnel. Solutions to these challenges include:


Automated Systems: Utilizing automated systems for labelling, tracking and managing test items can significantly reduce errors and improve efficiency.


Robust Training Programs: Investing in comprehensive training programs ensures that all personnel are competent in handling test items according to standard procedures.


Regular Reviews and Updates: Continuously reviewing and updating procedures to incorporate new technologies, regulations and industry best practices helps maintain compliance and improve overall laboratory performance.


Test item identification is a critical component of ISO/IEC 17025:2017, ensuring the integrity and reliability of laboratory results. By understanding the requirements and implementing best practices, laboratories can achieve compliance with this standard, enhance their operational efficiency and build trust with clients and regulatory bodies. Proper test item identification is not just a regulatory requirement; it is a cornerstone of quality and competence in the laboratory environment.


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