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The measurement of total arsenic concentrations is generally adequate for environmental compliance monitoring, but knowledge of discrete inorganic and organic arsenic species concentrations is crucial to understanding true toxicity and health risks to humans and aquatic or terrestrial organisms. Humans are exposed to arsenic in many ways, including occupational exposure (e.g. smelting, mining), drinking water, and food sources, but the toxicity of different arsenic species and sources varies greatly. Read More

Even though an engine coolant system is an integral component for engine health, 20 times more engine oil samples are tested than coolant samples. Cooling system problems are related to a significant number of engine health issues. Read More

Hydraulic fluid viscosity is critical to optimizing pump and system efficiency. There is a narrower viscosity range where power losses are minimized and power transfer is maximized. The greater the viscosity of a fluid, the more energy that is required to move the fluid regardless of workload.  Read More

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Selenium (Se) is an essential nutrient for humans and many microorganisms, as a component of selenoproteins such as selenocysteine (the 21st amino acid) and selenomethionine. The recommended dietary allowance for selenium is 55 μg/day, but excessive levels can cause human health problems (selenosis). Read More

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Biobased lubricants are defined as those that are biodegradable and derived from renewable raw materials, generally a plant based source. These oils are frequently made from a variety of vegetable oils, such as rapeseed, canola, sunflower, soybean, palm, and coconut oils.  Read More

Grease compatibility depends mostly on the compatibility of the thickener or soap base used by different products. Base oil compatibility and additives can also be a consideration. Even grease with similar thickener types can sometimes lead to lubrication problem when mixing different products, resulting in damage of the lubricated parts. Read More

At ALS we know that optimizing time spent in the field is important to our clients, as is the reduction of manual handling.  Read More

Bacterial diversity profiling is used for identification and classification of microorganisms present in a complex and mixed microbial community. This analysis is based on 16S rRNA gene sequencing using Next Generation Sequencing (NGS) technology and provides insight into the full microbiome. Read More