Labthink C840M Evaporative Residue Tester for Plastic Infant Feeding Bottles and Food-Contact Containers

Overview

The Labthink C840M Evaporative Residue Tester is a dedicated laboratory instrument engineered for the quantitative determination of non-volatile residue—commonly referred to as “evaporative residue”—in aqueous or alcoholic extracts of plastic infant feeding bottles, food-contact packaging containers, and other polymeric materials intended for direct contact with consumables. It operates in strict accordance with standardized gravimetric methodology defined in key regulatory test protocols, including GB 31604.8–2023 (National Food Safety Standard – Determination of Evaporative Residue in Food Contact Materials), ISO 14475:2011 (Plastics – Determination of Extractable Substances), and relevant sections of EU Regulation (EC) No. 10/2011 on plastic materials and articles intended to come into contact with food. The system integrates controlled temperature drying, precision mass measurement, and extract handling workflows to ensure high reproducibility and traceability across sequential test cycles.

Key Features

• Integrated dual-zone heating platform: One zone maintains constant extraction temperature (e.g., 60 °C, 70 °C, or 95 °C per standard requirements); the second zone provides uniform, draft-free drying at precisely regulated temperatures (typically 100 ±2 °C or 105 ±2 °C) to ensure complete solvent evaporation without thermal degradation of residues.
• High-stability analytical balance interface: Compatible with external Class I or II analytical balances (0.1 mg readability) via RS232 or USB connection; automatic tare and weight logging synchronized with drying cycle completion.
• Modular sample holder design: Accommodates up to six 100 mL glass evaporating dishes (standard DIN/ISO geometry) with individual positioning markers and heat-dissipation optimization to minimize inter-sample thermal interference.
• Programmable test sequences: User-defined drying duration (15–120 min), pre-drying stabilization time, and post-drying cooling intervals—each configurable to meet specific method validation criteria under GLP or internal QA procedures.
• Robust stainless-steel chamber construction with insulated double-wall housing: Ensures thermal stability, operator safety, and long-term resistance to solvent vapor corrosion.

Sample Compatibility & Compliance

The C840M supports testing of plastic bottles (PP, PE, PC, Tritan), silicone nipples, bottle liners, and rigid or semi-rigid food-contact polymer containers. Sample preparation follows standardized extraction procedures using simulant solutions such as distilled water, 3% acetic acid (w/v), 15% ethanol (v/v), or 50% ethanol (v/v), depending on intended food type and migration conditions (e.g., temperature, contact time). All operational parameters—including drying temperature accuracy (±1.5 °C), chamber airflow control, and dish placement geometry—are validated to satisfy the instrumental requirements outlined in GB/T 5009.60–2003 and ASTM D5223–15 (Standard Test Method for Extractables in Polyolefin Packaging). The instrument is routinely employed in laboratories undergoing CNAS accreditation (ISO/IEC 17025) and supports full audit trails when integrated with compliant balance and LIMS systems.

Software & Data Management

While the C840M operates as a hardware-controlled benchtop unit without embedded touchscreen software, it delivers structured data output compatible with laboratory informatics infrastructure. Weight values are timestamped and exported in CSV format via serial communication, enabling seamless integration with electronic lab notebooks (ELN), chromatography data systems (CDS), or custom QA databases. When used alongside Labthink’s optional DataMaster™ companion software (sold separately), users gain access to automated report generation—including calculation of residue mass per surface area (mg/dm²) or per unit volume (mg/L)—as well as statistical process control (SPC) charts, calibration history logs, and 21 CFR Part 11-compliant user authentication and electronic signature modules.

Applications

• Quality control release testing of baby bottle batches prior to market distribution.
• Migration studies supporting compliance documentation for EU Declaration of Conformity (DoC) and FDA Food Contact Notification (FCN) submissions.
• Raw material qualification of polymer resins, colorants, and processing aids used in food-grade molding operations.
• Method development and validation for internal SOPs aligned with ISO 22000 and FSSC 22000 food safety management systems.
• Regulatory response support during national food safety inspections or third-party certification audits (e.g., SGS, Bureau Veritas, Intertek).

FAQ

Does the C840M include an integrated balance?
No—the C840M is designed for use with externally connected analytical balances meeting ISO 9001 or OIML R76 Class I specifications.
Can it be used for non-aqueous simulants such as olive oil or 95% ethanol?
Yes, provided appropriate extraction vessels and ventilation safeguards are implemented; however, drying parameters must be adjusted per ISO 14475 Annex B guidelines for high-boiling-point solvents.
Is the instrument suitable for testing metal or glass containers?
It is primarily optimized for polymeric food-contact articles; while technically usable for inert substrates, residue interpretation requires separate validation against substrate-specific background controls.
What maintenance is required for long-term accuracy?
Bi-weekly verification of chamber temperature uniformity using NIST-traceable thermocouples and quarterly balance calibration are recommended per ISO/IEC 17025 Clause 6.4.
Does Labthink provide installation qualification (IQ) and operational qualification (OQ) documentation?
Yes—customized IQ/OQ protocols compliant with GMP Annex 15 and WHO TRS 986 are available upon request for regulated pharmaceutical or infant nutrition manufacturing environments.