colorimetric monitoring Articles

  • Highly sensitive colorimetric determination of malathion using gold nanoparticles

    A highly sensitive method is presented for the colorimetric determination of malathion using gold nanoparticles (AuNPs). In this approach, the synthesized AuNPs solution was stabilized by the citrate anions as their repulsion protected the AuNPs from aggregation. The synthesized AuNPs were characterized morphologically by using transmission electron microscopy technique. Malathion caps the ...


    By IWA Publishing

  • In-pipe monitors turn dreams into reality

    In-pipe monitors turn dreams into reality The quality of tap water has improved enormously in recent decades, but for largely technological reasons, until recently, knowledge of water quality between the treatment works and the tap has been an almost impossible dream for water treatment and distribution network managers. In this article, Jo Cooper, Product Specialist at Intellitect Water, will ...


    By Intellitect Water Ltd

  • PureAire’s Methyl Bromide Monitor Gains Exposure from the Department of Pesticide Regulation

    There has been an increased awareness for methyl bromide safety in the past few months. Over a year ago two employees at a cold storage warehouse got physically ill from high levels of methyl bromide. The Ch3br gas was off gassing from the products causing a higher than safe level for the employees. Commodities being shipped from overseas must be fumigated in ports, or warehouses upon arrival to ...

  • PureAire Methyl Bromide Monitor Gains Exposure from Lowered 5ppm criteria to 1 ppm Limit

    There has been an increased awareness for methyl bromide safety in the past few months. A year ago a worker got sick from breathing high levels of off gassing methyl bromide in a warehouse where commodities were being stored. Commodities coming from overseas must be fumigated in ports, or warehouses upon arrival. September 1, 2011 the California EPA will announce the regulations for methyl ...

  • Phosphate detection in water - a potential amperometric approach

    Excess phosphorus causes eutrophication (excess of nutrient promoting a proliferation of plants, (especially algae) inecosystems. Consequently, the monitoring of phosphate in waste, drinking and natural water is of major importance.There is a strong interest in a method alternative to the standard molybdate colorimetric method, which is not well suited to continuous monitoring under field ...


  • Honeywell gas detectors serve emergency backup role in U.S. rocket launch to destroy spy satellite

    A U.S. Standard Missile 3 (SM-3) enabled by Honeywell technology recently shot down a rogue U.S. spy satellite in space carrying over 1000 pounds of hydrazine, a highly toxic chemical used in rocket fuel. Meanwhile, Honeywell Analytics gas detection technology played a critical backup role in the operation: the company’s Single Point Monitor (SPM) was deployed at over 25 FEMA locations throughout ...


    By Honeywell Analytics, Inc.

  • EPA Compliant Letter

    APPENDIX I (Continued) B. Air Monitoring Equipment There are different methods available for air monitoring. These include colorimetric detector tubes (e.g., National Draeger, Sensidyne, Matheson-Kitagawa, MSA) and realtime remote sensing monitors (e.g., PureAire Monitoring Systems). NOTE: These air monitoring methods apply to enclosed areas, including greenhouse soil ...

  • A molecular imprinted polymer based sensor for measuring phosphate in wastewater samples

    Phosphate detection in water samples is still completed using colorimetric standard methods, which have a number of disadvantages, to such as being time consuming, requiring filtration, a number of different reagents, frequent calibration and proper disposal of waste chemicals generated. Hence, a simple cost effective analytical method and instrumentation is highly desirable to aid the ...


    By IWA Publishing

  • Heavy Metals Water Testing Powered by DNA

    Water pollution is a worldwide problem affecting developing and developed countries alike. Heavy metal contaminants are one prevalent type of water pollutant. They are persistent in the environment once d is charged and removal from source waters is necessary to ensure a clean drinking water supply. The problem of heavy metal pollution arises from several sources. Heavy metals such as uranium can ...


    By ANDalyze

  • EPA and DPR Compliant Letter

    Department of Pesticide Regulation Mary-Ann Warmerdam Director Arnold Schwarzenegger Governor 1001 I Street · P.O. Box 4015 · Sacramento, California 95812-4015 · www.cdpr.ca.gov A Department of the California Environmental Protection Agency June 25, 2008 ENF 08-17 TO: County Agricultural Commissioners SUBJECT: ...

  • Aerating recycled water on mushroom composting sites affects its chemical analysis and the characteristics of odor emissions

    Recycled water (RW) containing compost leachate can be a potent source of foul odor on mushroom composting sites. Samples of RW were repeatedly collected from storage tanks and pits of 14 mushroom composting sites in England and Ireland. Relationships between the effects of submerged aeration of the RW, the chemical and microbial characteristics of the RW, and the odors emitted were investigated. ...

  • Wastewater engineers go with the flow

    The efficiency of maintenance work has been improved by water treatment engineers employing Intellisonde monitors in their final effluent. Designed primarily to measure water quality, the Intellisondes also measure flow, and this reading is being used to detect the accumulation of debris that necessitates a maintenance visit. Wastewater treatment efficiency is often measured by the analysis of ...


    By Intellitect Water Ltd

  • THMs presented at WQTC, Boston, 1996

    ABSTRACT Strategic Diagnostics Inc. (SDI) markets a simple, colorimetric technology that can supplement trihalomethane (THM) testing using EPA methodology. Conventional analysis of total THMs requires the use of gas chromatography methods, which involve expensive equipment, extensive user training, and significant run time (30-45 minutes). This rapid, lowcost method enables water ...


  • Advanced Water Quality Techniques Course

    Abstract:The development of a strategic water quality monitoring program is based on prioritizing risks to public safety and economic reality. The development of global standardized methods and protocols for automated water quality monitoring would facilitate international communication of water quality information and comparison of standardized methods and protocols. The three primary methods ...


  • Inno-badge – an electronic dosimeter badge for continuous recording of a worker`s exposure to Phosgene gas

    Untitled Document Phosgene, also known as Carbonyl Chloride, is a widely used but highly toxic substance. At room temperature Phosgene gas is nearly colourless, and at low concentrations ...


    By Baum Publications Ltd.

  • Is your Plant as tight as you think? Leak Detector for extremely toxic Gases, a Field Test Report

    Leak detection of commodity gases in chemical plants is a day-to-day practice. The sensor technology available for this application is field proven and reliable. No question about it, existing sensors will do the job. However, in plants manufacturing or handling extremely toxic substances, the picture is different. For example, take phosgene. The existing sensor technology for leak detection ...

  • FTIR gas analysis improves container safety

    Introduction Entry to freight containers represents a significant hazard to staff responsible for inspection, stuffing or destuffing because of the large number of airborne chemicals that can be present. Research in Germany and the Netherlands found hazardous levels of gases and vapours in around 20% of all containers and this level of contamination is now accepted as commonplace. It ...


    By Gasmet Technologies Oy

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