After the sample is digested, the cadmium ion forms a red complex with 6-bromobenzothiazole azonaphthol in an alkaline solution, which is dissolved in chloroform, then it is quantitative compared with the standard series. Then the absorbance is detected at a specific wavelength to calculate the cadmium concentration.

Characteristics:

l Valve components selection. It can select the reagent sampling sequence, with flexible channels, variable functions, minimum dead volume, easy maintenance, long service life and other advantages.

l Printing function. It can be connected to a printer (optional order) to print the measured data in time.

l It adopts 7-inch touch screen, with simple operation interface, easy for users to learn, operate, and maintain.

l Super large data storage capacity. It can realize storage of historical data for no less than 5 years (measurement interval is 1 time/1h), which greatly meets the needs of customers.

l Automatic leakage alarm function. When reagent leakage occurs, the instrument will automatically alarm to remind the user to perform maintenance.

l Light signal recognition function to ensure high accuracy of quantification.

l Simple and convenient chemical reagents maintenance. The reagents can be replaced once a month, which greatly reduces the maintenance of the user.

l U disk one-click upgrade. The software update is much easier.

1 Method basis: Spectrophotometry.

2 Measuring range: 0锝?.0mg/L.

3 Accuracy: 卤10% or 卤0.0005mg/L (the larger of the two).

4 Repeatability: 10% or 0.0005mg/L.

5 Measurement period: The minimum measurement period is 30 minutes.

6 Sampling cycle: time interval (10锝?999min arbitrarily adjustable) and hourly measurement mode.

7 Calibration cycle: adjustable at any interval from 1 to 99 days.

8 Maintenance cycle: 1 time/month.

9 Reagent consumption: less than 0.1 RMB/sample.

10 Display: 10-inch color screen, 1024*600, 16.77 million true colors.

11 Output: RS-232, 4-20mA (optional).

12 Communication protocol: Modbus RTU, new national standard protocol, dynamic control protocol, and others.

13 Environment requirements: indoor with adjustable temperature, recommended temperature +5锝?8鈩傷 humidity 鈮?0% (no condensation).

14 Power supply: AC220卤10% V, 50卤10% Hz, 5A.