Online Zinc AnalyzerMethod Introduction:

Atomic absorption spectrophotometry (GB/T 7475-87)

Dithizone spectrophotometric method

Anodic stripping voltammetry

Oscillographic method

Online Zinc Analyzermain parameter：

Record data and files, save values and results, and store historical records

Ethernet (standard), USB serial port interface, RS232, RS485 (MODBUS communication protocol)

Calibrate passive points, maintain contacts, remote/local contacts, start analysis, reset analysis, wait analysis, pause analysis

High load of 600 ohms, 4-20mA (current blocking) can provide two output quantities

Machine malfunction alarm and data upper and lower limit alarm

Zinc：

Zinc is also a beneficial element for the human body. Each liter of water contains several milligrams of zinc, which is harmless to humans and warm blooded animals, but has a significant impact on fish and other aquatic organisms. The safe concentration of zinc for fish is about 0.1 mg/L. In addition, zinc has a certain inhibitory effect on the self purification process of water bodies. The main sources of zinc pollution are wastewater discharged from electroplating, metallurgy, pigments, and chemical industries.

Atomic absorption spectrophotometry (GB/T 7475-87) is used to determine zinc, with high sensitivity and minimal interference, and is suitable for various water bodies. In addition, dithizone spectrophotometry, anodic stripping voltammetry, or oscillopolarography can also be used. Among them, atomic absorption spectroscopy, voltammetry, and polarography have been introduced in the determination of cadmium. Below is a brief introduction to the dithizone spectrophotometric method.

Measure its absorbance after blank correction and quantify it using the standard curve method. There are small amounts of bismuth, cadmium, cobalt, copper, lead, mercury, nickel, and stannous ions in the water that cause interference. Sodium thiosulfate is used to mask and control the pH value of the solution to eliminate them. This method is called color mixing assay. If the interference ion content mentioned above is high and the measurement error of the mixed color method is large, the monochromatic method needs to be used for measurement. The difference between monochromatic and mixed color methods is that the organic phase after extracting colored chelates is first washed with a mixture of sodium thiosulfate sodium acetate nitric acid to remove some interfering ions, and then excess dithizone is washed away with newly prepared 0.04% sodium sulfide.

When using this method, ensure that the sample is not contaminated. For this purpose, zinc free glassware must be used and thoroughly washed to purify the reagents and use zinc free water.

Using a 20mm colorimetric dish, the low detection concentration of the mixed color method is 0.005 mg/L. Suitable for the determination of zinc in natural water and lightly polluted ground water.

basic operation：

The analyzer has successfully passed a series of tests for installation and setup. During installation, simply connect the reagent, sample, waste liquid pipeline, and power cord, and set the parameters to start. Automatic calibration, automatic cleaning, automatic testing, and automatic data saving. Long term self-control, low maintenance, low operating costs, fully automatic operation, low chemical consumption, short preparation time, simple maintenance, no need for special electrician training.