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Anodic Stripping Voltammetry Heavy Metal Monitoring Instrument
Anode Stripping Voltammetry Arsenic On-line Analyzer
product details

Product model: ASV8000-As


Measurement Method

Anodic stripping voltammetry is an internationally recognized method for detecting trace heavy metals, which meets international standards.


How It Works


The pre-treated water sample is injected into a special electrolytic cell composed of multiple electrodes by injection pump, and then reacts with strong acidic reagents first, through which all forms of arsenic to be measured in the water sample are uniformly converted into ionic state, and then masking agent is added to eliminate the influence of interfering substances on the measurement and eliminate oxygen in the solution. Finally, the electrode system in the electrolytic cell is started. Through the electrode process of enrichment, static, scanning, etc., the position of the anode dissolution peak generated by the reverse scanning process represents different kinds of heavy metals to be measured, and the size of the anode dissolution peak is proportional to the concentration of the heavy metal substance, so the arsenic content to be measured in water can be calculated according to the peak potential and peak current.



Measuring electrode


Three electrode system, according to the measurement object can replace the corresponding Au electrode, Ag electrode, Hg membrane electrode, glass carbon electrode;


Measurement mode options


Timing measurement enables the instrument to be started every day at any time the user wants to monitor;

Isochronous measurement can automatically start the instrument for measurement every few hours at a fixed time interval every day;

Continuous measurement can realize automatic sample measurement one by one, which can be used for product acceptance and related technical certification;

Manual measurement can realize the user to start the measurement at any time, and can be used for field experiment comparison and equipment installation and debugging;


Scope of Application


Can cover surface water, groundwater, drinking water, seawater and treated sewage discharge mouth heavy metal concentration online monitoring.


Technical Parameter


Detection factor: arsenic (As);
Measuring range: 0-0.02/0.1/1mg/L;
Accuracy: <±10% when >0.005mg/L, <±0.001mg/L when <0.005mg/L;
Repeatability: <±5% when >0.005mg/L, <±0.001mg/L when <0.005mg/L;
Zero drift: ±0.001mg/L;
Range drift: ±10%;
MTBF (trouble-free running time) : ≥720 h/ time;
Actual water sample comparison: ±10%;
Voltage stability: ±3%;
Ion interference: ±15%;
Enrichment time: can be set arbitrarily;
Scanning time:
Scanning speed:
Man-machine dialogue: 8-inch color LCd touch screen, resolution 800X600;
Measurement time: can be set, generally 10min;
Correction mode: automatic timing correction or manual correction;
Reagent consumption: only 4mL reagent is consumed per measurement;
Sampling inside the instrument: non-contact injection pump;
External sampling: submersible pump and self-priming pump are provided respectively;
Maintenance cycle: one month;
Secondary pollution: anodic dissolution method does not use toxic and harmful reagents, no secondary pollution;
Data transmission: 4-20MA, RS232, RS485;
Ambient temperature: 0°C to +50°C;
Mechanical size: 530×1340×390mm;
Data storage: can store one year of valid data;
Weight: approximately 45kg;
Power supply: (220±20) VAC /(50±0.5) Hz;
Power consumption: approximately 60 W.


System Characteristics


The analyzer can replace the corresponding working electrode according to the measurement object, in order to meet the test requirements of different water samples.

Enrichment and scanning times can be adjusted, and the determination process and results meet relevant industry standards.

The very low measurement limit ensures that all kinds of water quality online monitoring needs are met.

The elimination of interfering substances and co-existing ions is chemically masked to ensure that any water sample can be accurately measured.

The customized adjustable quantitative sampling device ensures that the instrument can accurately measure various water samples by adjusting the reagent dosage and sampling amount.

Non-contact injection pump is used to avoid direct corrosion of reagents, which can extend the life of core components and reduce user costs.

All imported components, analytical flow path design and reagent formulation ensure measurement reproducibility, which can reach 5% at present.

Automatic operation, no personnel on duty, can achieve automatic zero, automatic calibration, automatic measurement, automatic cleaning, automatic maintenance, self-protection, automatic recovery and other intelligent functions.

On-line monitoring methods are diversified, which can realize manual measurement at any time, automatic timing measurement, automatic periodic measurement and other measurement methods.