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Photometers Applications

  • Water quality monitoring systems for portable water plants

    Low maintenance and reliability are key requirements for analyzers in potable water plants. Cost of ownership is another big issue.

    By SWAN Analytische Instrumente AG based in Hinwil, SWITZERLAND.

  • ASTM Color (0-7) #3070

    ASTM color is an important product quality measurement for many refinery and petrochemical processes. The purpose of this application note is to determine ASTM (D1500) color with the ClearView db fiber optic photometer for real-time ASTM color measurement from 0-7. Quantify yellowness for product quality measurement for many refinery and petrochemical processes. Get results in real-time (seconds). Use for ASTM and other parameters in complex streams. Detect potential cross-over contamination in fill or supply lines in real-time. Gain significant improvements in process control. Guided Wave's in-process NIR analyzer will determine ASTM (D1500) color in real time helping operators improve process control 24/7.

    By Guided Wave Inc, based in Rancho Cordova, CALIFORNIA (USA).

  • APHA Color #3020

    Measurement of APHA color either on-line or in a laboratory setting using a photometer. Background: APHA is sometimes referred to as the Platinum Cobalt (Pt/Co) or Hazen scale. Also referred to as a “yellowness index”, the APHA color scale is a common method of comparison of the intensity of yellow-tinted samples to assess the quality of liquids that are clear to yellowish in color. Originally developed to determine the purity of municipal water supplies, it is now used as a metric for purity in the water, chemical, oil, plastics, and pharmaceutical industries. APHA color quantifies the appearance of trace amounts of yellowness, which is a visual indicator of product degradation due to exposure to light or heat; the presence of impurities and negative effects of processing. As such APHA color is often used as a product release specification. APHA is a single number yellowness index. The units are based on a dilution of a 500ppm solution of PtCo.

    By Guided Wave Inc, based in Rancho Cordova, CALIFORNIA (USA).

  • Hydroxyl Number in Polyols (OH#) #3013

    The use of polymeric polyols is commonplace in the manufacturing of polyurethanes and other specialty polymers. The hydroxyl number (OH#) is a measure of the concentration of the hydroxyl groups on the polyol. This is an important parameter to monitor and control during polyol production. The laboratory method that is commonplace for hydroxyl number determination is both time consuming and involves the use of hazardous materials. This note will discuss the use of Guided Wave hardware and software tools for the measurement of hydroxyl number in polyols using fiber optic-based, Near-Infrared (NIR) spectroscopy. NIR can be applied in real time directly in process or as a laboratory procedure. In either case NIR is a time and money saving alternative to traditional methods. NIR also offers the benefit of increased safety over traditional methods. For well established process measurements, a Guided Wave ClearView® db multi-wavelength photometer can be used to achieve similar results.

    By Guided Wave Inc, based in Rancho Cordova, CALIFORNIA (USA).

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