Hexavalent Chromium Analysis

1.Principle of Hexavalent Chromium Analysis

Hexavalent Chromium Analysis was used for the determination of hexavalent chromium concentration in water samples by spectrophotometry with dissolved dibenzoyl dihydrazine.This product uses diphenylcarbazide spectrophotometric method for determination. After the water sample and the regulator are mixed, hexavalent chromium reacts with the indicator in an acidic environment and in the presence of an indicator to generate a colored complex. The analyzer detects the change in color and converts this change into a hexavalent chromium value for output. The amount of the generated colored complex is equivalent to the amount of hexavalent chromium.

2. Hexavalent Chromium Analysis Product Features

The new photoelectric quantitative technology is not affected by interference such as large chromaticity, large amounts of suspended matter, and large amounts of bubbles. It has high reliability and accuracy and strong anti-interference ability.

High detection accuracy, low measurement limit and small long-term drift of the instrument.

It has one-button self-test function and self-diagnosis function.

Adopt single-channel highly integrated valve group, maintenance and cleaning are simple and quick.

All-weather networking function, monitor the instrument operation status anytime and anywhere.

It has alarm function, quality control function and reverse control function.

It has automatic cleaning and automatic calibration functions.

It has functions of hourly measurement, interval measurement and external control measurement.

It will work automatically after power failure.

Automatic prompt and automatic reset function for fault and reagent (sample) shortage.

With fault recording function.

Can save historical data for more than 3 years.

Meet the requirement of separate discharge of cleaning liquid and waste liquid

3. Hexavalent Chromium Analysis Technical Parameters

Measurement method: Diphenylcarbazide spectrophotometric colorimetry

Measuring range: 0-2 mg/L; 0-20 mg/L; range can be customized

Indication error: ≤±8% Detection limit: 0.01mg/L

Repeatability: ≤±5% Waste volume: 6mL/time

Memory effect: ≤±0.3mg/L Actual water sample comparison: When the concentration is ≤0.400mg/L, compare

Detection error ≤ 0.06mg/L, concentration ＞ 0.400mg/L

Comparison detection error ≤ ±15%

Constant temperature time: 360 seconds Voltage stability: ≤±5%

Measuring cycle: 25 minutes Calibration cycle: any specified time

Maintenance cycle: ≥720h/time Maintenance workload: <2 hours/month

Reagent consumption: 3 months/500ml Display output: Equipped with 10.1-inch color LCD touch screen

Color development temperature: recommended temperature is 125℃, can be set according to the actual water sample conditions

Data export: The measured values can be imported into a USB flash drive and saved via the USB port

Signal output: RS485/RS232/USB interface/standard 2-way 4-20mA output/standard 2-way switch input and output

Environmental requirements: Temperature-controlled indoor environment, recommended temperature (5-28°C), humidity ≤ 90% (no condensation)

Power supply and power: (220V±22)V/AC, (50±0.5Hz), 5A, 150W

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