ZXcm-500-Cr6 Hexavalent Chromium Water Quality Online Analyzer-Fornitore globale

Building A1, Area A, Optics Valley Core Center, No. 52 Liufang Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province

1、 Alias

Hexavalent chromium analyzer, hexavalent chromium monitoring instrument, hexavalent chromium tester, hexavalent chromium detector, hexavalent chromium online monitoring instrument, hexavalent chromium online detector, hexavalent chromium analyzer, hexavalent chromium automatic monitoring instrument

2、 Application scope

The hexavalent chromium online analyzer is used for automatic continuous analysis and detection of hexavalent chromium in industrial wastewater, surface water, drinking water, seawater, and industrial production process control.

3、 Detailed description

Instrument features:

The unique design enables this product to have a lower failure rate, lower maintenance, lower reagent consumption, and higher cost-effectiveness compared to similar products.

★ Optical components: Choose the rare dual beam used in domestic online monitoring instruments, which is not affected by various environmental factors during detection. Automatically correct system errors, improve instrument measurement accuracy, stability, and repeatability.

★ Select valve components: Use original imported components from the United States, Japan, or Germany. International mainstream fluid components with smaller dead volume and simpler operation.

★ Measurement component: The reagent measurement is achieved through a visual photoelectric system, overcoming the quantitative error caused by wear of the peristaltic pump tube; At the same time, quantification of trace reagents has been achieved, with each dose being only 1-5 milliliters, greatly reducing the amount of reagents used.

★ Sample injection component: Peristaltic pump negative pressure suction, there is always an air buffer zone between the reagent and the pump tube to avoid corrosion of the pump tube.

★ Reagent tube: Imported modified PTFE transparent hose with a diameter greater than 1.5mm is used to reduce the probability of particle blockage in water samples.

★ Signal processing: The instrument adopts imported high-precision analog-to-digital conversion chips, greatly enhancing the scalability of the core board, adapting to various usage environments, and making the operation of the instrument easier and more user-friendly.

★ Temperature control: The temperature control system is composed of imported temperature measuring components and adopts temperature compensation technology to overcome the influence of temperature drift and ensure that the sample reaction conditions are more in line with requirements.

★ Software advantages:

1. The entire software system framework and external facilities of the instrument make human-computer interaction more convenient and functional applications more complete;

2. The pollution caused by different water quality on special sites during the instrument measurement process can be set in real-time, greatly reducing the instrument failure rate caused by this problem and making the measurement data more accurate;

3. The instrument has an automatic calibration mode. After automatic calibration, the instrument returns to automatic mode and runs according to the user's set parameters, without the need for staff to monitor the entire process, greatly reducing maintenance time and improving maintenance efficiency;

4. Instrument measurement of water samples is divided into online mode (i.e. automatic mode) and offline mode (i.e. manual mode). In offline mode, calibration tubes are used for measurement, without the need to remove the water sample tube from the sampling port or cup, making maintenance more convenient;

5. The instrument can store 200000 pieces of data and the data can be exported with just one click;

6. The online mode (i.e. automatic mode) and offline mode (i.e. manual mode) of the instrument store data independently, and the offline mode data is not uploaded to the data acquisition instrument, avoiding the impact of instrument maintenance on uploaded data.

fourBackground related to hexavalent chromium

Sources of chromium pollution

The main sources of chromium pollution in the environment are wastewater and particulate matter discharged from industrial sectors such as tanneries, chrome mining plants, beneficiation plants, smelting and electroplating plants, machinery manufacturing plants, automobile manufacturing plants, aircraft manufacturing plants, dye factories, printing plants, and pharmaceutical factories. The pollutants of chromium include sodium dichromate, potassium dichromate, ammonium dichromate, sodium chromate, lead chromate, strontium chromate, barium chromate, calcium chromate, potassium chromate, chromic anhydride (chromium trioxide), etc. Tanning, smelting, electroplating, pharmaceutical, printing and dyeing and other industries discharge chromium containing wastewater into Rivers and Lakes, causing water pollution. Chromium is mainly present in water as trivalent and hexavalent chromium compounds. Most trivalent chromium is adsorbed by sediment and transferred to the solid phase, with a small amount dissolved in water; Hexavalent chromium is relatively stable in alkaline water and exists in a dissolved state with strong migration ability.

Environmental hazards of hexavalent chromium

Hexavalent chromium (Cr6+) belongs to the category of heavy metal pollutants, which have strong oxidative toxicity and can cause damage to human and crop bodies. Research has shown that hexavalent chromium has extremely strong carcinogenic and mutagenic properties. Cr (VI) enters the human body through the bloodstream and can cause vomiting, diarrhea, gastric congestion, ulcers, visceral bleeding, brain edema, renal tissue necrosis, and even death. If it invades the human body through the respiratory tract, it can cause rhinitis, pharyngitis, ulcers, and even perforation. Long term effects can cause lung lesions. There have been many literature discussions on the toxicity of Cr (VI). The US Environmental Protection Agency has identified hexavalent chromium as one of the 17 highly hazardous toxic substances.

Principle of determination of hexavalent chromium

In acidic solution, Cr (VI) reacts with diphenylcarbazide (DPC) to form a purple red Cr phenylazocarbazide complex, which is measured by spectrophotometry at a wavelength of 540nm. Within a certain concentration range, Lambert Beer's law is followed, and the absorbance is proportional to the concentration of Cr (VI) in the water sample. By measuring the absorbance, the content of Cr (VI) in the water sample can be indirectly obtained.