Astori CryoSpecial 1 Milk Cryoscope

Overview

The Astori CryoSpecial 1 Milk Cryoscope is a precision laboratory instrument engineered for the accurate determination of freezing point depression in raw bovine milk—a colligative property directly correlated with water adulteration. Based on thermodynamic principles defined in IDF-ISO 5764:2009 and AFNOR standards, the CryoSpecial 1 delivers traceable, metrologically validated measurements essential for dairy quality control, regulatory compliance, and supply chain integrity. Its operation relies on controlled thermal equilibration and phase transition detection at the liquid–solid interface, where the onset of ice crystal formation is identified via high-resolution temperature monitoring during programmed cooling. Designed for routine use in dairy laboratories, QC facilities, and milk collection centers, the instrument meets the stringent accuracy and repeatability requirements mandated under Chinese national standard GB 5413.38–2010 and has undergone formal verification by the China National Institute of Metrology.

Key Features

• Peltier-based refrigeration system with closed-loop coolant circulation—ensures stable thermal gradients and eliminates reliance on external chillers or cryogenic fluids.
• Automated sample agitation and thermal equilibration sequence, fully software-controlled to minimize operator variability and maximize inter-laboratory reproducibility.
• Real-time air-flow compensation and automatic zero-point correction to mitigate ambient temperature drift and sensor hysteresis effects.
• High-resolution platinum resistance thermometer (PRT) with ±0.0005 °C resolution and ±0.0025 °C reproducibility for raw milk matrices—validated across multiple independent inter-laboratory studies.
• Intuitive touchscreen interface with multilingual support (English, Chinese, Spanish, French), enabling seamless operation in multinational dairy testing environments.
• Compact benchtop footprint (29 × 44 × 33 cm) and low-profile measurement head optimized for integration into space-constrained QA/QC labs.

Sample Compatibility & Compliance

The CryoSpecial 1 is specifically calibrated and validated for unprocessed bovine raw milk, including samples containing natural somatic cell variations, minor fat globule dispersion differences, and typical microbial load ranges encountered at farm-gate or receiving stations. It is not intended for ultra-high-temperature (UHT) processed, homogenized, or reconstituted milk powders without prior method validation. All measurement protocols align with ISO/IEC 17025:2017 general requirements for competence of testing and calibration laboratories. Instrument traceability is maintained through NIST-traceable reference standards (e.g., certified freezing point standards at −0.512 °C, −0.408 °C, and −0.600 °C), supplied with each unit. Regulatory alignment includes full compatibility with GB 5413.38–2010, IDF Standard 5764, and EU Regulation (EC) No 853/2004 concerning hygiene rules for food of animal origin.

Software & Data Management

The embedded firmware supports GLP-compliant data handling with audit-trail functionality, user-access levels (operator, supervisor, administrator), and timestamped result logging. Raw thermal curves, derivative plots, and final freezing point values are stored internally and exportable via RS232 serial interface to LIMS or Excel-compatible formats. Optional EP-50 thermal printer enables immediate hard-copy reporting with configurable headers (lab ID, analyst, sample ID, date/time stamp). Software updates are delivered via USB flash drive; no cloud dependency or internet connectivity is required—ensuring data sovereignty and network security in regulated environments. All data records comply with FDA 21 CFR Part 11 requirements when paired with appropriate procedural controls and electronic signature implementation.

Applications

• Detection and quantification of water addition in raw milk—critical for fraud prevention and fair pricing at dairy cooperatives and processing plants.
• Verification of milk authenticity during intake inspection at pasteurization facilities and cheese dairies.
• Supporting ISO 22000 and FSSC 22000 food safety management systems through objective, instrument-based verification of compositional integrity.
• Method transfer and cross-validation between regional laboratories participating in national dairy monitoring programs.
• Research applications in dairy science, including studies on seasonal variation in freezing point, mastitis-related solute shifts, and cold-chain stability assessment.

FAQ

What reference standards are included with the CryoSpecial 1?
Each unit ships with three certified freezing point standards: −0.512 °C (for routine verification), −0.408 °C (for intermediate calibration), and −0.600 °C (for low-end validation), all supplied in 250 mL bottles.
Is the instrument suitable for goat or buffalo milk analysis?
While the CryoSpecial 1 is calibrated for bovine milk per IDF-ISO 5764, method adaptation for non-bovine species requires empirical recalibration using species-specific reference materials and validation per ISO 5725 series guidelines.
How often must the cooling fluid be replaced?
The proprietary coolant (part no. 67200) is designed for ≥12 months of continuous operation under standard lab conditions; replacement interval is logged automatically in the service history module.
Can the instrument connect to modern LIMS platforms?
Yes—via RS232 serial output with ASCII-formatted data packets; optional protocol converters support Modbus RTU or TCP/IP bridging for legacy or enterprise LIMS integration.
Does the CryoSpecial 1 meet FDA or EU regulatory requirements for official testing?
It satisfies technical criteria outlined in FDA Grade “A” Pasteurized Milk Ordinance (PMO) Appendix H and EU Commission Implementing Regulation (EU) 2021/2005 for freezing point testing of raw milk, provided operated within validated environmental conditions and maintenance schedules.