Heavy metal pollution is an important factor affecting food safety. Heavy metals such as lead, cadmium, and mercury can accumulate in the human body through the food chain, posing a serious threat to health. Traditional atomic absorption and other detection methods have expensive equipment, complex operations, and long cycles. This article deeply analyzes the working principle and technical advantages of a food heavy metal detector based on optoelectronic technology, and combines industry pain points to explain how it provides efficient and accurate on-site detection solutions for fields such as grain processing, food production, and market supervision.

1、 Invisible Health Killer and Testing Dilemma

For quality inspectors at grain purchasing stations, quality control managers of food processing enterprises, and regulatory personnel in agricultural product markets, how to quickly identify heavy metal content in rice, vegetables, and aquatic products is a major challenge. Once heavy metals such as lead, cadmium, mercury, etc. enter the human body through the food chain, they can cause irreversible damage to the nervous system, kidneys, etc., especially affecting children's development more severely.

Although traditional laboratory testing methods are accurate, they require expensive instruments and equipment (such as atomic absorption spectrometers), professional operators, and several days of testing cycles, which cannot meet the needs of rapid screening and instant decision-making on site. Therefore, the industry urgently needs a testing equipment that can quickly provide reliable results at acquisition sites, production workshops, and market stalls. The food heavy metal detector integrates advanced optoelectronic detection technology into portable devices, making rapid screening of heavy metals the * * line of defense for food safety supervision.

2、 Core principle

This food heavy metal detector adopts photoelectron reflectance analysis technology, and its core principle is to quantitatively analyze the heavy metal content in the sample by measuring the reflectance of the reaction products.

Its testing process is scientifically rigorous:

Sample pretreatment: Dissolve or extract the test sample (such as crushed rice or vegetables) to convert heavy metal elements into detectable forms.

Color reaction: The processed sample undergoes a specific color reaction with a specialized reagent, and the color intensity of the resulting product is proportional to the heavy metal content. The higher the content, the darker the color.

Optical detection: The instrument's built-in visible light source illuminates the reactants, and high-precision optical sensors detect their reflected light signals. The detection range is 0-30000, ensuring accurate measurement of samples of various concentrations.

Intelligent algorithm analysis: The instrument automatically calculates the * * content of heavy metals in the sample through a built-in algorithm model based on the correspondence between reflectivity and heavy metal content.

Result output: The detection results are displayed in real-time on the 7-inch touch screen and the detection report can be printed immediately.

This method avoids the complex operation of large instruments and achieves rapid and on-site detection of heavy metals.

3、 Technical advantages and performance parameters

The design of this food heavy metal detector fully considers the strict requirements of on-site testing, and its technical advantages are reflected in multiple aspects:

1. Performance testing

High precision optical system: adopting precise optical design to ensure the accuracy of reflectivity measurement. When the standard sample simulating reflectance is around 50%, the precision CV value is ≤ 0.8%.

Excellent repeatability: repeatability reaches ± 0.1% (A), stability ≤ 0.003A/3min, ensuring high consistency of multiple measurement results for the same sample.

Accurate quantitative ability: absorbance accuracy ± 2.0%, linear error ± 1.0%, ensuring the reliability of the detection results.

2. Operational experience

Humanized interactive interface: equipped with Android intelligent operating system, 7-inch high-sensitivity true color touch screen, simple and intuitive operation.

High throughput detection: 12 independent detection channels can simultaneously test multiple samples, with each sample working independently without interfering with each other, greatly improving detection efficiency.

Intelligent data management: The body can store 200000 test results, support data export, and facilitate quality traceability and analysis.

3. Networking function

Multi mode data transmission: Supports 4G wireless networking, WiFi networking upload, GPRS wireless remote transmission, and detection data can be quickly uploaded to the regulatory platform.

Real time printing output: Equipped with a built-in printer, it can immediately print the test results, providing a basis for on-site law enforcement.

Open data port: can connect to the regulatory platform database to achieve real-time data sharing.

4. Portable performance

Lightweight and portable: The host weighs no more than 3kg, making it easy to carry and operate on site.

Long battery life: Equipped with a large capacity battery, it meets the needs of on-site law enforcement inspections.

Durable and sturdy: The instrument size is 360X300X125 (mm), with a compact structure, suitable for field operations.

4、 Industry pain points and solutions

1. Limitations of traditional detection methods

• Poor timeliness: unable to meet the need for quick on-site decision-making

• High cost: Small and medium-sized enterprises find it difficult to afford the testing fees

• High professional threshold: requires professional laboratories and personnel

Low flexibility: difficult to cope with sudden detection needs

2. Innovative solution for food heavy metal detector

On site speed: 15 minutes for results, improving regulatory efficiency

Cost optimization: The cost of a single test is only 1/10 of that in the laboratory

• Easy to operate: Non professionals can operate it after training

• Mobile detection: supports various on-site work scenarios

The food heavy metal detector simplifies complex heavy metal detection into on-site rapid operation through innovative optoelectronic technology, solving the pain points of low efficiency and high cost of traditional methods. Its fast, accurate, and convenient characteristics make it an important tool for food safety risk prevention and control. With the continuous improvement of people's requirements for food safety, food heavy metal detectors will play a more important role in ensuring "safety on the tongue" and promoting the development of food trade.