Hengaode Instrument5mgLOperating precautions and principles of desktop zinc ion zinc concentration meter

It mainly involves sample processing, signal detection, data calculation, and result display. Instruments with different technological paths may have differences in specific implementation, but their core processes are similar.

Sample processing and pretreatment

The water sample to be tested usually needs to be pre treated to ensure measurement accuracy. For example, for the determination of total zinc content, the sample may first be sent to a digestion reaction tank, where a strong oxidant is added for UV heating digestion to uniformly oxidize all forms of zinc into divalent zinc ions and decompose organic interfering substances.‌

1 After pretreatment, the solution may adjust its acidity and add a color developer to form a colored complex of zinc ions, with the color depth proportional to the zinc concentration

Signal detection method

The detection principle varies depending on the type of instrument, and common methods include:

‌electrochemical method‌Based on ion selective electrodes, the sensitive membrane specifically recognizes zinc ions, generating a weak potential signal that follows the Nernst equation with zinc concentration.‌

4 Alternatively, anodic stripping voltammetry can be used to first enrich zinc ions on the electrode surface, and then measure the oxidation current by scanning the potential. The current magnitude reflects the zinc content.‌

‌Spectral method‌For example, atomic absorption spectroscopy calculates concentration by measuring the absorption intensity of zinc atoms at specific wavelengths of light.‌

8 The colorimetric method detects the absorbance after the color reaction using a photometer, and the absorbance value is proportional to the zinc concentration.‌

Principle and daily application of heavy metal zinc analyzer for water quality detection

Data Calculation and Display

The detected raw signal (such as potential or absorbance) is transmitted through the internal microstructure of the instrument