Overview
SIST ISO 4876:1995 specifies a standardized method for the determination of maleic hydrazide residues in tobacco and tobacco products. This method is also applicable to detecting these residues resulting from the use of maleic hydrazide sucker control agents on tobacco crops. Adherence to this standard supports quality control, consumer safety, and regulatory compliance throughout the tobacco industry.
The standard outlines essential procedures involving sample preparation, chemical analysis, and spectrophotometric measurement, with additional optional procedures for challenging sample types. It ensures high reliability and repeatability of results, while promoting safe laboratory practices.
Key Topics
- Scope of Application: Evaluation of maleic hydrazide residues in raw tobacco and finished tobacco products, as well as agricultural residues.
- Analytical Techniques: Utilization of boiling, distillation, reduction, and spectrophotometric analysis to quantify maleic hydrazide.
- Sample Preparation: Guidelines for grinding and selecting representative test portions for analysis.
- Optional Procedures: Annex A details acid pre-digestion and carbon clean-up to address challenging sample matrices.
- Distillation Notes: Annex B offers vital safety and procedural notes for effective and secure distillation.
- Documentation: Clear reporting and calculation requirements to ensure credible and traceable results.
- Laboratory Safety: Emphasis on the use of safety screens, heat-resistant gloves, and proper handling of caustic chemicals.
Applications
This standard holds practical value for a variety of stakeholders in the tobacco sector:
- Tobacco Industry: Ensures product quality and safety by providing consistent testing for maleic hydrazide residues in both raw materials and finished products.
- Regulatory Authorities: Enables compliance with national and international residue limits, supporting public health policies.
- Analytical Laboratories: Offers validated, repeatable methods for chemical residue testing in tobacco leaves and products, including optional techniques for difficult sample types.
- Agricultural Producers: Assesses the effectiveness and residue profile of maleic hydrazide sucker control agents used in tobacco cultivation.
- Research & Development: Facilitates studies in agronomy, chemistry, and toxicology related to tobacco and chemical residue management.
Related Standards
Integration with other standards enhances operational consistency and laboratory efficiency. Key related documents include:
- ISO 4874: General conditions for sampling tobacco and tobacco products, ensuring representative and uncontaminated test samples.
- ISO 1042: Specifications for one-mark volumetric flasks used in preparative steps.
- ISO 4793: Definitions for laboratory sintered filters, relevant to filtration steps in the analysis.
- ISO 1770: Requirements for solid-stem thermometers, essential for accurate temperature control during analysis.
Summary
SIST ISO 4876:1995 is a critical reference for the determination of maleic hydrazide residues in the tobacco industry. By providing a reliable, standardized method, it supports the delivery of safe, high-quality tobacco products and facilitates regulatory adherence. The inclusion of optional extra procedures and safety guidelines makes the standard adaptable for diverse laboratory environments and sample complexities. For organizations involved in tobacco production, control, or regulation, following this international standard is essential for competent residue analysis and risk management.
