and associated accessories for image capturing is a fall back for their frequent use in
colorimetric sensors. Scanners has some benefits over digital cameras and smartphones i.e. problems like focusing, blurry corners, movement, alignment, lighting,
etc. which will affect the image quality and can cause variations in sensor data does
not comes into existence while using scanners. But they suffer due to certain
demerits like as lack of instant scanning of image, portability and extended scanning time for the acquisition of high-resolution image. Additionally, colour card are
the physical colour reference for comparisons and measurements in colorimetric
sensors. These are widely used in textile industry, food industry, photography etc.
Although this approach is easy to implement and requires negligible instrumentation for the analysis but this method is largely affected by the intensity of light and
error while color interpretation. Other devices like membrane strip reader which are
type of microplate reader, fiber optic devices, etc. are also investigated in colorimetric imaging, but these devices suffer from user friendliness and portability, as
they are not popular in comparison to the other available devices.
5 Case Study: Commercial Accomplishments of Existing
Colorimetric Sensor Platforms for Water Pollutants
Knowingly, water pollution has turn out to be one of the utmost tenacious ecological glitch in the world today. Although a limited effort to commercialize the
technology of colorimetric sensory platforms for the real-world water pollutant
monitoring application have been known and now exists in global market. Some
companies like Thermo Fisher Scientific, Merck, Sigma-Aldrich, Hanna
Instruments, Elabscience, Libelium, Cole Parmer, CHEMetrics, Appealing
Products, Inc., MicroWaterman, Appealing Products, Inc., Industrial Test Systems,
Vitality Plus Australia, Inc., Industrial water systems, have also fruitfully commercialized their kits for online water quality monitoring as portrayed in Fig. 10. In
this section, case study on recent progress in existing colorimetric sensor platforms
is described with an emphasis on the various water pollutants i.e. chemical,
microbiological, and other ecological contaminants. Furthermore, we highlight the
available commercial kits and deliberate their market-potential to water research.
Thermo Fisher Scientific launched Orion
™
AQUAfast AQ4000 Colorimeter to
measure water and wastewater pollutants with 65 pre-programmed methods,
automatic selection of four wavelengths and timer [30]. The water quality parameters measured include dissolved ions like as cyanide, fluoride, nitrite, nitrate,
chloride, iodide, bromide, sulphide, ammonia, zinc, phosphate and sulphate. The
company provides auto-test ampoules reagent with Orion
™
AQUAfast AQ4000
colorimeter to abridge sample preparation and tests. The auto-test ampoules enclose
a pre-measured quantity of liquid colorimetric reagent and effortlessly fill with the
precise volume of sample to be tested for reagent mixing. Respectively, every
Materials in Colorimetric Detection of Water Pollutants
139
colorimetric sensors. Scanners has some benefits over digital cameras and smartphones i.e. problems like focusing, blurry corners, movement, alignment, lighting,
etc. which will affect the image quality and can cause variations in sensor data does
not comes into existence while using scanners. But they suffer due to certain
demerits like as lack of instant scanning of image, portability and extended scanning time for the acquisition of high-resolution image. Additionally, colour card are
the physical colour reference for comparisons and measurements in colorimetric
sensors. These are widely used in textile industry, food industry, photography etc.
Although this approach is easy to implement and requires negligible instrumentation for the analysis but this method is largely affected by the intensity of light and
error while color interpretation. Other devices like membrane strip reader which are
type of microplate reader, fiber optic devices, etc. are also investigated in colorimetric imaging, but these devices suffer from user friendliness and portability, as
they are not popular in comparison to the other available devices.
5 Case Study: Commercial Accomplishments of Existing
Colorimetric Sensor Platforms for Water Pollutants
Knowingly, water pollution has turn out to be one of the utmost tenacious ecological glitch in the world today. Although a limited effort to commercialize the
technology of colorimetric sensory platforms for the real-world water pollutant
monitoring application have been known and now exists in global market. Some
companies like Thermo Fisher Scientific, Merck, Sigma-Aldrich, Hanna
Instruments, Elabscience, Libelium, Cole Parmer, CHEMetrics, Appealing
Products, Inc., MicroWaterman, Appealing Products, Inc., Industrial Test Systems,
Vitality Plus Australia, Inc., Industrial water systems, have also fruitfully commercialized their kits for online water quality monitoring as portrayed in Fig. 10. In
this section, case study on recent progress in existing colorimetric sensor platforms
is described with an emphasis on the various water pollutants i.e. chemical,
microbiological, and other ecological contaminants. Furthermore, we highlight the
available commercial kits and deliberate their market-potential to water research.
Thermo Fisher Scientific launched Orion
™
AQUAfast AQ4000 Colorimeter to
measure water and wastewater pollutants with 65 pre-programmed methods,
automatic selection of four wavelengths and timer [30]. The water quality parameters measured include dissolved ions like as cyanide, fluoride, nitrite, nitrate,
chloride, iodide, bromide, sulphide, ammonia, zinc, phosphate and sulphate. The
company provides auto-test ampoules reagent with Orion
™
AQUAfast AQ4000
colorimeter to abridge sample preparation and tests. The auto-test ampoules enclose
a pre-measured quantity of liquid colorimetric reagent and effortlessly fill with the
precise volume of sample to be tested for reagent mixing. Respectively, every
Materials in Colorimetric Detection of Water Pollutants
139