Multi-function Portable Water Quality Analyzer

I. Instrument Overview

This instrument is a multi-functional portable water quality testing device that integrates conventional water quality item testing, voltammetric heavy metal testing, biological toxicity testing and rapid ATP testing. It can be used for on-site rapid screening and emergency monitoring, as well as for routine laboratory analysis 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.

3. Biological toxicity detection: Luminous bacteria continuously emit visible fluorescence during normal metabolism, and the luminous intensity is positively correlated with bacterial metabolic activity. When toxic substances are present in the water sample, bacterial metabolism is inhibited and the luminous intensity decreases accordingly; the stronger the toxicity of the sample, the greater the decrease in luminous intensity, showing a good negative correlation. The instrument quantitatively evaluates the acute toxicity level of the sample by precisely measuring the change in luminous intensity of the luminous bacteria before and after contact with the sample.

4. Rapid ATP testing: ATP testing is based on the firefly luminescence principle, using the "luciferase-luciferin system" to rapidly detect adenosine triphosphate (ATP). The ATP swab contains a lysis solution that can release ATP from microbial cells and cause a luminescence reaction with the specific enzyme in the reagent. Since all living cells contain ATP, the ATP content can clearly indicate the amount of microorganisms and other biological residues in the sample; the number of microorganisms is proportional to the luminescence value, which can be used to judge the sanitary condition.

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.

It can be used for rapid screening and quantitative/semi-quantitative evaluation of the comprehensive toxicity of water samples, including surface water, industrial wastewater, domestic sewage and emergency accident water samples.

It can be used for rapid ATP testing to quickly evaluate sample cleanliness, microbial contamination trends or on-site sanitary conditions.

IV. Instrument Features

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

2. ★ One instrument realizes conventional water quality testing, voltammetric heavy metal testing, biological toxicity testing and ATP testing.

3. Water quality test 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. ★ Two biological toxicity detection modes: bacterial luminescence method biological toxicity detection (quantitative) and chemiluminescence method biological toxicity detection (qualitative).

11. ★ Rapid ATP detection: results reported in 15 s; upper and lower limits can be set to automatically judge pass/fail.

12. 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.

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

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

V. Technical Parameters

1. Performance parameters

(1) Water quality detection module

(2) Voltammetric heavy metal module

(3) ATP module

(4) Biological toxicity module

2. Environmental parameters

3. Physical parameters