Cr(III)/Cr(VI)
Applications
- Drinking water
- Industrial wastewater discharge limit monitoring or process optimization
- Surface water
Description
The 3S colorimeter is a compact analytical instrumentation for online analysis and process monitoring. The colorimeter is based on a color-developing chemical reaction carried out inside the analyzer's glass cell. The sample, coming from an external reservoir or process stream is autonomously grabbed by the instrument and mixed with the appropriate reagents to make the reaction happen. The analyzer uses an LED light source and a photodiode to photometrically measure the developed color intensity (absorbance). The absorbance is proportional to the concentration of the target chemical species (analite).
Features:
- Low reagents consumption and analytical reliability thanks to our custom designed miniature peristaltic pumps
- Dual compartment design to guarantee a complete separation between the electronics and the hydraulic section
- Color touchscreen to show the last measured value clearly, and to set all the options and settings via an user friendly interface
- Datalogger function with data history in graphical form and USB download
- Automatic calibration, validation and cleaning to reduce down time and operator intervention, their frequency can be freely set by the user
- Fully integrable in industrial automation via the analog outputs (2 x 4-20 mA channels), digital output (2 relays + ModbusRTU) and digital input (voltage free contact)
Colorimetric analyzer for Cr(III) / Cr(VI) ions determination.
Method
The determination is based on the reaction of 1,5-diphenylcarbazide with Chromium(VI) in an acid medium. The absorbance intensity is proportional to the chromium concentration in the sample and is measured at 525 nm.
Reagents
Standard solutions
- Chromium standard solution kit (predosed powder) 1000 ppm, 1 L
- Chromium standard solution kit (predosed powder) 100 ppm, 1 L
- Chromium standard solution, 1000 ppm, 500 mL
- Chromium standard solution 1000 ppb, 1 L
- Chromium standard solution, 100 ppm, 500 mL
- Chromium standard solution, 100 ppm, 1 L
- Chromium standard solution, 200 ppb, 1 L
- Chromium standard solution, 500 ppb, 1 L
Features
| Range (Ø 26 mm) |
300 ppb |
| Range (Ø 16 mm) |
1000 ppb |
| Range (with dilution) |
50 ppm |
| Wavelength | 525 nm |
| Number of reagents | 2 |
| Min. analysis time | 6 minutes |
Technical Specifications
| Model | CL |
| Sampling Mode | Batch, with freely settable frequency. |
| Sample |
Pressure: Atmospheric Temperature: 2 - 70 °C (36 - 158 °F) Flow Rate: 80 to 500 mL/min Connection: 6 mm (¼-in.) |
| Drain |
Pressure-free drain Connection: 12 mm (½-in.) |
| Input Streams | 2 |
| Cabinet Material | Epoxy-coated stainless steel AISI 304 |
| Dimensions (H x W x D) | 604 x 380 x 242 mm (23.6 x 14.8 x 9.4 in) |
| Weight | 20 kg (44 lbs) |
| Power Supply |
Input Voltage:115 - 240 VAC 50/60 Hz or 24 VDC (optional) Power consumption: max. 80 W |
| Output signals |
2 x 4-20 mA analog outputs Modbus RTU via RS485 |
| Alarms | 2 SPDT programmable voltage-free relays |
| Digital Input | Remote start / stop |
| Ambient Temperature | 5 - 45 °C (41 - 113 °F) |
| Ambient Humidity | 10 to 90 % RH (indoor use only, outdoor installation possible with protective cabinet or shelter not included) |
| Protection Grade | IP54 |