Heavy Metal Rapid Detection Instrument

The Voltammetric Heavy Metal Analyzer (Rapid Heavy Metal Tester for Grains) is a high-precision electrochemical analysis instrument designed to detect the levels of heavy metals—such as lead and cadmium—in grain samples, including white rice and brown rice. Using the single-use three-electrode anode stripping voltammetry method in conjunction with screen-printed electrode consumables and a simple sample pretreatment process, this instrument enables rapid quantitative detection of heavy metals such as lead and cadmium. It is suitable for a variety of applications, including grain safety, food safety, and rapid testing in market regulation.

The detection principle is based on anodic stripping voltammetry, and the process is as follows:
Pre-treatment: After grinding the sample, an extraction solution is used to extract and dissolve heavy metal ions (such as Cd²⁺ and Pb²⁺).
Enrichment: A negative voltage is applied, causing the metal ions to reduce and enrich on the surface of the working electrode.
Stripping: A reverse scanning voltage is applied, causing the enriched metals to re-oxidize and strip off, producing characteristic “stripping peaks.”
Quantification: Qualitative analysis is based on peak potential, while quantitative analysis is based on peak current; content is calculated by comparing results to a standard curve.

Applicable standards include JJF 2037-2023 “Calibration Specification for Portable Anodic Stripping Voltammetric Heavy Metal Analyzers,” GB 2762-2022 “National Food Safety Standard: Maximum Limits for Contaminants in Food,” and T/GXAGS 010-2025 “Rapid Simultaneous Determination of Cadmium and Lead in Rice—Anodic Stripping Voltammetry.”

Applications include the following areas:
Food Security: Rapid determination of heavy metals in grains such as rice, paddy, wheat, and corn, as well as their processed products.
Food Safety: Detection of heavy metals in foods such as vegetables, fruits, aquatic products, and dairy products.

• Android system with a 7-inch color touchscreen for integrated operation.

• Based on anodic stripping voltammetry, it offers significantly higher sensitivity than traditional colorimetric methods or X-ray fluorescence, enabling accurate quantification.

• Streamlined and standardized sample preparation allows for the simultaneous detection of multiple parameters, including lead and cadmium, with a single extraction.

• The entire testing process for a single sample takes ≤20 minutes, and the stripping voltammetry curve is displayed in real time once the sample is loaded.

• The magnetic-attachment elastic-contact electrode holder allows for convenient electrode replacement while preventing wear and ensuring a stable connection (patented technology).

• Disposable three-electrode assemblies are ready-to-use and require no polishing. This prevents cross-contamination and ensures a safe, pollution-free environment for both operators and the surrounding area.

• Cadmium and lead detection are included as standard; testing can be expanded and upgraded to include arsenic, mercury, copper, chromium, zinc, and other parameters based on user needs.

• Historical data can be stored locally and can also be uploaded wirelessly to a platform. Built-in high-speed thermal printer supports real-time printing of test results.

• Software can be remotely updated via Wi-Fi.