USGS analysis examined concentrations of chloride, dissolved solids and nitrate in groundwater
There was no change in concentrations of chloride, dissolved solids or nitrate in groundwater for more than 50% of well networks sampled in a new analysis by the U.S. Geological Survey (USGS) that compared samples from 1988 to 2000 to samples from 2001 to 2010. For those networks that did have a change, seven times more networks saw increases as opposed to decreases.
Newly published research paper demonstrates test inaccuracies due to sample holding time
Water management services company Phigenics LLC recently announced the publication of a research paper that demonstrates up to 33% false-positive test results for Legionella bacteria when following conventional sampling methods.
The Complete RO Screen was developed with input from membrane manufacturers and treatment professionals. This package tests for most factors that can reduce the life of an RO membrane. Due to the nature of RO produced water, the testing was designed to provide lower detection levels. This test package is also beneficial for other applications that require pure water. New and improved compact packaging will reduce shipping costs.
There are many portable handheld devices that measure dissolved solids, but not all instruments are equal. Beyond the product specifications, how can you tell which instrument to choose? Even when you choose the best instrument, how can you get accurate repeatable readings? This article addresses design and use issues that affect the accuracy of conductivity, resistivity and total dissolved solids (TDS) measurements so that you choose the right instrument for your application and use it correctly.
Design features and calibration tips for accurate dissolved solids measurements
NSF Intl. certified Sensorex’s product line design and production facility
Sensorex’s analytical product line’s design and production facility, featuring advanced cellular manufacturing equipment and practices, has been approved and certified by NSF Intl. to the 9001:2008 standard.
The Ultrapen PT2 pH & temperature pen features a proprietary sensor design and 1-,2- and 3-point calibration. With two pH measurement modes to choose from, it has an accuracy of ±0.01 pH with automatic temperature compensation and readout. The Ultrapen is waterproof and features durable, fully encapsulated electronics powered by a 1 N-type battery.
AquaChek Spa is a six-in-one test strip developed specifically for hot tubs. The 15-second, dip-and-read strip includes tests for six parameters: total chlorine, total bromine, free chlorine, total alkalinity, pH and total hardness. To use, dip the test strip into the spa or hot tub, compare using the color chart and adjust chemical levels as needed.
The AquaChek Copper 3-in-1 test strip is designed for mineral purification systems that are used as an alternative for sanitizing pools and hot tubs. The test strip allows for easier monitoring and controlling of copper levels in pool and spa water. It also measures pH and total alkalinity, helping to prevent scaling and corrosion caused by unbalanced pH levels.
Last summer’s wave of tropical storms left the East Coast scrambling to ensure drinking water quality. Water Quality Products editorial intern Raissa Rocha spoke with Marc Hamel of testing equipment manufacturer Horizon Technology Inc. to discuss the impact weather events may have on water quality.
Raissa Rocha: What is your experience with companies and laboratories concerning water samples that need to be taken after a weather event occurs?
Industrial Test Systems Inc. manufactures inorganic Arsenic Quick test kits that provide accurate results at affordable prices. The ETV-verified, patented kits require no technical training and are recognized as premium inorganic arsenic field test kits. The kits report results in as few as 14 minutes and detect amounts as low as 0.3 ppb.