Portable Heavy Metal Detector

Brand: Wuhan Biological Intelligence Manufacturing (Wuhan Academy of Agricultural Sciences)

Specification Model: WNK-TSMD1004

Four-channel portable heavy metal detector

has four independent detection channels, through anodic stripping voltammetry, supporting disposable screen-printed electrodes can detect lead and cadmium in grain at the same time. Using room temperature extraction-purification enrichment technology, the heavy metals in grain are effectively extracted in a short time, and then at a certain potential, the metal ions to be tested are reduced to metal elements and enriched on the electrode surface, and then a reverse voltage is applied to the electrode to oxidize the metal on the electrode surface to generate oxidation current. According to the voltammetry curve of the oxidation process, the concentration of the metal ions to be measured is calculated.

1) Performance parameters:

① Detection channels: four channels alone or simultaneously detected (a total of four detection channels);

② Through anodic stripping voltammetry, lead and cadmium in grain can be detected at the same time;

③ Supporting the use of modified disposable screen printing electrodes, the reference electrode, the counter electrode, the working electrode three electrodes integrated on a test chip, no electrode treatment, current resolution 10-8 A

④ Sample pretreatment using room temperature extraction - purification enrichment technology;

⑤ Detection time: on-machine detection time 6min; ④

detection limit: lead 0.03 mg/kg, cadmium 0.03 mg/kg;

0006 Lead and cadmium reproducibility 10%, accuracy 10%