The ST-600 automatic fat determinator (fully automatic Soxhlet extractor) is built based on the national standard Soxhlet extraction principle, integrating five functions: hot soaking, constant temperature extraction, solvent rinsing, automatic recovery, and in-situ drying. It can simultaneously process six samples in a single batch and is widely applicable to crude fat detection in industries such as grain and oil, feed, food, dairy products, Chinese herbal medicines, and soil. It is a standard equipment for physical and chemical testing in quality inspection laboratories, research institutes, and production enterprises.

1. Intelligent segmented temperature control, ensuring precise and stable detection data

The instrument is equipped with an imported chip control system and a 2.5-inch color LCD display, which simultaneously displays the set temperature, actual temperature, and stage countdown in real time. It automatically provides audible and visual reminders when the program ends. It supports 6 independent program temperature control, with a free adjustment range from room temperature to 200℃. The temperature control accuracy can reach ±0.2℃. Users can customize the soaking, extraction, recovery, and drying temperature zones and durations according to samples with different oil contents, perfectly matching the national standard testing process.

Equipped with a high-precision temperature sensor and an upper temperature limit protection, it automatically cuts off heating and sounds an alarm in case of overtemperature, effectively preventing organic solvents such as ether and petroleum ether from reaching their ignition points. With minimal temperature fluctuations during prolonged continuous experiments, it achieves excellent reproducibility with a relative standard deviation (RSD) of ≤±1% for fat content detection within the range of 5% to 100%. The consistency of parallel sample data is also excellent.

II. Fully enclosed well-type heating, with a long-lasting leak-proof design

Adopting a deep-well fully enclosed well-type electric heating structure, the sample aluminum cup is heated uniformly in all directions, avoiding local high temperatures that can cause oil decomposition. The innovative design of a plug-free condenser tube combined with a polytetrafluoroethylene (PTFE) sealing structure eliminates the traditional pain points of wear and leakage associated with glass plugs, significantly improving the sealing performance and extending the service life of glass components.

The core shell of the entire machine is made of electrolytic mirror stainless steel, which is resistant to corrosion from organic solvents such as ether and petroleum ether. It is not prone to rusting after daily wiping and cleaning, and maintains stable appearance and performance even after long-term use in the laboratory. Equipped with a three-position manual lifting handle, it allows for one-button switching between soaking, extraction, and recovery stations, making operation effortless and simple. Novices can quickly get started.

III. Automatic solvent recovery, reducing costs while ensuring laboratory safety

Equipped with an integrated solvent recovery and storage pipeline, the system boasts a solvent recovery rate of ≥85%, significantly reducing the consumption of ethyl ether and petroleum ether reagents and lowering the cost of laboratory testing consumables. The entire experiment process features a closed solvent circulation system, preventing volatile organic waste gases from escaping and improving the laboratory operating environment.

The equipment is equipped with an independent solvent discharge valve, allowing for centralized collection and recycling of solvents after experiments, which can be refined and reused in a unified manner. The entire machine is equipped with complete water circuit interfaces. In summer, the condensation water temperature is controlled to be ≤24℃ to ensure condensation efficiency, while in winter, the pipeline can be drained to prevent freeze cracking of the condensation pipe. Multiple water circuit protections eliminate the potential risk of water leakage.

IV. Integrated multifunctionality, simplifying the entire experimental process

Traditional Soxhlet extraction requires the replacement of multiple devices to complete extraction and drying. The ST-600 integrates an in-situ drying function, eliminating the need to transfer aluminum cups after extraction and solvent recovery. It directly dries samples at a constant temperature inside the device, saving the step of oven transfer and shortening the overall testing time. Equipped with a full set of standard accessories (aluminum cups, filter paper tube racks, and dedicated tubing), it can be put into testing immediately after unpacking. It is suitable for a wide range of sample sizes from 0.5 to 15g, and is versatile for various samples such as grains, oilseeds, high-protein feed, and traditional Chinese medicinal materials.

V. Improve safety protection and reduce operational risks in laboratories

The entire machine comes standard with multiple safety mechanisms: over-temperature power-off protection, reliable grounding to prevent shell electrification, and a fully enclosed heating chamber to block high-temperature steam. Before taking or placing samples, a one-click power-off operation can be performed to avoid the risks of high-temperature burns and organic solvent ignition. The machine is equipped with a standardized wiring structure, ensuring stable circuitry and reducing the risk of short circuits. The manufacturer provides a one-year warranty for the entire machine, long-term supply of spare parts, and comprehensive after-sales support.

Application Scenarios

It is suitable for conducting quantitative analysis of crude fat/soluble organic matter in samples such as grain and oilseeds, livestock and poultry feed, meat and dairy products, traditional Chinese medicinal materials, soil organic matter, and rubber and plastic soluble substances, in accordance with the national standards GB 5512 and GB 6433. It also caters to the batch testing needs of third-party quality inspection centers, university laboratories, and quality inspection departments of food processing enterprises.