Measuring principle:
The HMA-CR6 hexavalent chromium heavy metal analyzer uses the diphenylcarbazide spectrophotometric method as its method for determining hexavalent chromium. In an acidic solution, hexavalent chromium in the water sample reacts with diphenylcarbazide (DPC) to form a violet-red compound, which is measured spectrophotometrically at a wavelength of 540 nm. Based on the difference between the initial color of the sample and the color after adding the color-developing reagent, colorimetric measurement is performed using a colorimeter, and the hexavalent chromium concentration is finally calculated.
The main methods for determining hexavalent chromium in water include the diphenylcarbazide spectrophotometric method, fluorescence spectrophotometry, ion chromatography, and atomic absorption spectrometry. The diphenylcarbazide spectrophotometric method for determining hexavalent chromium in water is widely used by environmental monitoring personnel due to its sensitivity and good selectivity.
Instrument features:
● Low waste liquid. Waste liquid volume is only 1.1L/month.
● Low reagent consumption. No reagent replacement is needed for one month, greatly reducing the cost of hexavalent chromium determination.
● Automatic calibration, ensuring more accurate measurement by the instrument.
● Equipped with an automatic backwash sample filter, automatically cleaning after each test to ensure more accurate measurement each time and reduce manual maintenance.
● High and low range modes, with automatic range switching and automatic dilution.
● Chinese menu, more suitable for Chinese users.
● Uses a 5.7” color LCD touch screen, making operation and display more intuitive.
Measuring method: Colorimetric method
Measuring range: 0.01-2mg/l (low); 0.02-5mg/l (high)
Accuracy: ±3%F.S
Repeatability: ±3%F.S
Zero drift: ±5%F.S
Measurement time: 25min
Auto calibration interval: Off, 1 day, 2 days…7 days selectable
Maximum reagent consumption: 1L/month
Sample flow rate: 1～3L/min, 50mL sampled each time for measurement
Sample temperature range: 10-40℃
Signal output: 4-20mA/RS232/RS485
Installation environment: Indoor installation
Power supply: AC220V±10%, 50Hz
Dimensions (H×D×W): 900×255×600mm (analyzer main body)
Weight: 60kg (excluding reagents)
Accessory information
7321530K Pure water tank (with level sensor)
7321540K Waste liquid tank (with level sensor)
Ordering guide
HMA-CR6 hexavalent chromium online analyzer, standard configuration includes: main unit, reagent bottle, installation accessories, operation manual, and test report.
HMA-CR6 Hexavalent chromium heavy metal online analyzer
Source: Public information from the HACH Water Quality website
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