Multi-function Portable Water Quality Analyzer

I. Instrument Overview

This instrument is a multi-functional portable water quality testing device that integrates spectrophotometric conventional water quality item testing and voltammetric trace heavy metal detection. It is suitable for routine laboratory analysis, on-site rapid screening, emergency monitoring and many other application scenarios.

II. Detection Principles

1. Conventional water quality items: The instrument performs quantitative water quality analysis based on the multi-wavelength spectrophotometric principle. Its multi-wavelength LED light source system (covering 420~860 nm) is preset with the optimal analysis wavelength according to national standard methods, ensuring the specificity and accuracy of detection. During testing, the user uses the matched premade reagents; after the color reaction of the water sample is completed, the colorimetric tube or test bottle is placed in the measuring chamber. According to the Lambert-Beer law, the instrument automatically matches the internal preset standard curve, thereby directly calculating the detection values of items such as COD, total phosphorus, total nitrogen and ammonia nitrogen.

2. Voltammetric heavy metal detection: Anodic stripping voltammetry is adopted, with the following process: Pretreatment: after the solid sample is crushed, it is extracted with an extraction solution to dissolve heavy metal ions (such as Cd²⁺ and Pb²⁺). Enrichment: a negative voltage is applied, and the metal ions are reduced and enriched on the surface of the working electrode. Stripping: a reverse scanning voltage is applied, and the enriched metal is re-oxidized and stripped, producing a characteristic "stripping peak". Quantification: qualification is based on peak potential and quantification on peak current, and the content is calculated by comparison with the standard curve.

III. Applications

It can be used for the detection of conventional water quality items such as COD, total nitrogen, total phosphorus, turbidity and other configured water quality items for on-site detection and laboratory comparison analysis.

It can be used for the detection of heavy metal items to judge the pollution risk of related metals in water samples and whether they exceed reference limits.

IV. Instrument Features

1. Android 10 system, 15.6-inch color touch all-in-one operation.

2. ★ One instrument realizes conventional water quality testing and voltammetric heavy metal testing.

3. Detection items can be customized according to user requirements.

4. ★ Built-in 4-hole digester and 4-hole cooling fan, independently controlled.

5. ★ Detection, digestion and cooling can be carried out simultaneously.

6. ★ Heavy metal detection is based on anodic stripping voltammetry, with sensitivity far higher than traditional colorimetric or X-ray fluorescence methods, enabling accurate quantification.

7. ★ The whole detection process for a single heavy metal sample takes ≤20 min, and the stripping voltammetry curve can be displayed in real time after loading.

8. ★ The heavy metal module adopts a magnetic elastic contact electrode holder, which facilitates electrode replacement while avoiding wear and ensuring stable connection.

9. ★ Heavy metal detection uses disposable screen-printed electrodes — single-use and requiring no grinding; there is no cross contamination, and operation is safe and environmentally friendly.

10. Local storage capacity up to 800,000 records; a built-in thermal printer can print test results immediately, and USB Excel data export is also supported.

11. ★ Wi-Fi networking for remote software upgrade; detection data can also be uploaded wirelessly to the platform client.

12. Built-in 6,000 mAh lithium battery, standby time 3 h, supporting outdoor detection.

V. Technical Parameters

1. Performance parameters

(1) Water quality detection

(2) Voltammetric heavy metal detection

2. Environmental parameters

3. Physical parameters