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A number of methods have been developed to measure trace levels of H2S. The most widely used measurement methods include gold film analysers, SO2 conversion, colourimetric gas detection tubes, electrochemical detectors, and lead acetate cassette tape gas detectors.
It is expensive, complicated and requires hazardous materials. There are also several interferences that can bias test results including mercaptans, ketones, high pH materials and various functional additives.
The Health Care industry has increased its needs for specialized devices over the past decade, which has led to a new frontier of resin and polymer development designed to keep the quality of care high while minimizing cost.
H2S is nasty stuff. The colourless gas is not only unpleasant, giving off that all-too-familiar “rotten egg” smell, it is also poisonous, flammable (even explosive in high concentrations), and ultimately corrosive to metal and concrete. But H2S generation in sewers depends upon a fairly complicated biological, chemical, and physical process that is worthy of its own production pathway.
For dogs, the most popular type of pet food is dry and – as you might expect – each brand tends to vary in moisture and ash content as well as in ingredient composition. Therefore, to ensure the highest quality product, commercial pet food manufacturers must carefully monitor the ingredients, mineral levels and moisture content in their pet foods to maintain a high level of consistency.
Agencies such as the Environmental Protection Agency (EPA) regulate and set strict limits on the amount of mercury vapour which can be present in air: 1μg/m3 for residential properties and 25μg/m3 for industrial properties. To ensure compliance with these regulations, industrial hygienists, clean-up crews and government agencies rely on portable instrumentation to measure mercury vapour levels on site. There are many different technologies which can be used to detect mercury, and some may be more appropriate in certain environments than others.
With the world’s population projected to eclipse 7 billion in 2011, and growing at approximately 1.2% per year, finding useable energy resources has become a global challenge. Diminishing supply and environmental concerns have been brought to light in recent years, exposing fossil fuels, currently the world’s primary source of energy, as unsustainable and potentially harmful to the environment. Because of this, clean renewable energy sources are controlling more of the available market, and biomass is one of the leading options on this front.
Water is the most abundant compound on the Earth’s surface, making up 71% of its surface area. It is a vital component for all known forms of life and is the aquatic habitat for thousands of species of microalgae, fish and shellfish...
Biomass is a form of renewable energy obtained from live organic materials or materials that were recently alive. Alcohol fuels, black liquor, refuse, corn husks and wood pellets are typical examples of materials that are categorized as biomass....
Many issues have been raised with HMRC’s proposed Loss on Ignition (LOI) testing regime for landfill taxes, including concerns that tests will take too long to be actionable and will cost too much to perform with any regularity. This may indeed be true for samples sent to a laboratory, but there is an alternative: the Computrac® MAX® 5000XL. The Computrac provides accurate loss-on-ignition test results in minutes, requires no operator skill, and is very inexpensive to operate.
Calcium Sulphate (CaSO4) more commonly known as gypsum is a naturally occurring white crystalline mineral that has many different uses and applications. When water is added to gypsum, the resulting gypsum paste can be moulded and shaped into various forms and dried to maintain its shape.
Whether it is fluorescent lighting, dental fillings, antique switches, gold mining or thermometers, the element mercury (Hg) is present in the world we live. Many of the mercury containing products give us comfort, are used to provide us with information, and even allow us to control our environment. While these products are safe, they could potentially expose people to a plethora of toxic compounds if an accident should occur.
The Health Care industry has increased its needs for specialized devices over the past decade, which has led to a new frontier of resin and polymer development designed to keep the quality of care high while minimizing cost.