Beginning February 1, 2019, instead of using the acronym “ND” for None Detected at or above the reporting limit, we are going to use the ‘less than’ symbol. Here’s what we mean. (Follow the red text): Old Format Quantity Found Sample Concentration Found RptLmt Units Vol (L) Time (min) Found RptLmt Units ND 0.25 UG Read More …
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Cost-Effective and Convenient Exposure Assessment: Could It Be on a Path Toward Big Data? by Dr. Charles Manning, PhD, CIH Industrial hygienists responsible for workplaces that use chemicals typically do chemical risk assessments using combinations of three methods: monitoring (air sampling), modeling, and professional judgment. Professional judgment (so-called “qualitative exposure assessment”) has traditionally been popular Read More …
In November 2017, we announced that we would begin transitioning to a new charcoal media for all of our charcoal- based badges. This change was made necessary because the manufacturer of the carbon material we have used for the last 10 years or so, decided they would no longer produce the carbon/PTFE material. Knowing that people do not Read More …
Assay Technology, Inc. manufactures several organic vapor monitors, most notably the 566, 546, and 525. Customers are asked to choose the best badge based on what they know about the environment and sampling duration. This flexibility is great for selecting the right ‘tool’ for the job, but it means laboratories have to be prepared to Read More …