Introduction

The seafood export industry operates under strict regulatory frameworks to ensure product safety, quality, and global trade compliance. At the heart of this system lies a robust Quality Management System (QMS) governed by the revised QS 9020:2022 standard which integrates Quality Assurance (QA) policies and Quality Control (QC) techniques. Together, these pillars substantiate the validity of analytical processes, ensure regulatory compliance, fulfil customer objectives, and adhere to applicable international standards.

The Quality Management System (QMS) Framework

A well-functioning QMS for seafood laboratories is built on clearly defined responsibilities across management, quality assurance officers, and staff. The QS 9020 revised standard lays out a structured approach to ensure consistent, reliable outputs.

Management Responsibilities

Senior management plays a critical role in quality systems by recognising the need for a Quality System, involving staff in its development, committing financial and personnel resources, ensuring meeting of laboratory safety requirements, systematically reviewing laboratory functions and assuming leadership in evaluating risks associated with errors.

Quality Assurance (QA) Officer Responsibilities

The QA Officer or Quality Manager must hold relevant coursework, training, and practical laboratory experience; be familiar with QA programs and QC practices; provide technical support to the team; sign off on all Standard Operating Procedures (SOPs); routinely update documentation and conduct frequent audits and report periodically to management.

Staff Responsibilities

Laboratory staff are integral to quality implementation and they must assist management in planning the QA program; help prepare SOPs; incorporate QA and QC activities into daily tasks and clearly understand their individual expectations and roles.

Elements of a Quality System Manual

The Quality System Manual is the cornerstone document of any accredited laboratory. It includes a clearly defined quality policy, organisational structure, personnel qualifications and responsibilities, and detailed equipment requirements. It also covers sampling procedures, analytical methods, validation protocols, analytical quality control practices, documentation control, internal audits, proficiency testing, and corrective and preventive actions. These elements together create a structured and traceable system that guides all laboratory processes and ensures consistency and reliability in operations.

Intra laboratory Quality Control Practices (QS 9020B)

Quality control practices are essential to maintain the accuracy and credibility of laboratory results. Intra laboratory activities such as monitoring air quality, validating autoclave performance, recording incubator temperatures, checking culture media quality, and calibrating equipment are critical routine practices. These are not merely procedural requirements but fundamental to ensuring dependable results.

Daily, monthly, and periodic quality control checks are vital to maintaining laboratory integrity. Key intra laboratory QC practices include:

1. Air Quality Monitoring — Bacterial density monitored monthly
2. Autoclave — Monthly bioindicator check; heat indicator tape used at each use
3. Balances — Daily zero-check; monthly accuracy check with reference weights
4. Biosafety Cabinet — Inspected for airflow each use; certified annually
5. Freezers/Refrigerators — Temperature checked daily, defrosted annually
6. Incubators — Temperature monitored twice daily during use
7. Glassware — Inspected for cleanliness, chips, and etching at each use
8. Hot-Air Sterilising Oven — Temperature verified with heat indicator tape and monthly bioindicator
9. Microscope — Optics cleaned and alignment checked each use
10. Culture Media — Sterility, pH, and appearance verified per batch; performance confirmed with positive and negative culture controls
11. Micro pipettors — Volume accuracy checked quarterly, calibrated annually
12. pH Meter — Standardised with at least two buffer solutions each use
13. UV Lamps — Bulb use monitored; performance tested quarterly
14. Plate Counts — Duplicate analyses and repeat counts performed monthly