Teledyne Leeman Labs Blog

Jason Davis

Recent Posts

Teledyne Leeman Labs: A Historical Perspective

Posted by Jason Davis on Mar 20, 2015 4:08:59 PM

History of Teledyne Leeman Labs

OldLeemanLabsInclogoIn 1981 John R. Leeman and Karl Hildebrand founded Leeman Labs to produce analytical instrumentation based on the promise of Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) [also referred to as Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES)] to identify and quantify the concentration of elements within a sample.

PS950ICPOESThis initial success established Leeman Labs as both an innovator and an expert in ICP-OES and lead the company to endeavor into other realms of atomic spectroscopy adding the DC Arc technique and Mercury Analysis to its line of analytical instrumentation.  In 2004 Leeman Labs was acquired by Teledyne technologies to augment Teledyne's existing laboratory and continuous monitoring instruments used in environmental applications, and complement Teledyne Tekmar's organic analysis instrumentation.

Today, its instruments can be found conducting analyses across a broad spectrum of industries and sample types.  The usefulness of Teledyne Leeman Lab’s elemental analysis instrumentation ranges from agriculture to aerospace and forensics to food in over 50 countries.

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Tags: mercury, mercury analysis, ICP-OES, ICP-AES, Leeman Labs

Part IV – Gold Rush: Mercury Exposure and the Human Body - Varying Risks

Posted by Jason Davis on Nov 21, 2014 9:47:37 AM

Part IV - Gold Rush Series

In part three of our Mercury blog series, we focused on the different types of Mercury. In part four, we will cover the effects of mercury on the human body.

As was described in part two of our series, mercury is a metal that is used in a variety of consumer products, from light bulbs to thermometers. While it is beneficial and useful for these applications, it is poisonous and can harm the environment, as well as any animals and humans that are exposed to it.

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Tags: mercury

Part II – Gold Rush: What is Mercury?

Posted by Jason Davis on Nov 4, 2014 3:30:00 PM

Part II – Gold Rush: What is Mercury?

Having taken a look at Gold Rush era mercury use and its modern consequences in our last blog it only seems logical to discuss what mercury is and why it poses such great human health risks.  Because mercury and its associated risks is a broad topic, part three of our series on mercury will only look at mercury’s most well known forms.

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Tags: mercury

The Gold Rush's Legacy… Once Gold, Now Mercury in Abundance

Posted by Jason Davis on Oct 28, 2014 3:26:31 PM

The following is Part I of a multi-part series of posts about Mercury



A recent series of articles in the The Tribune, a newspaper covering San Luis Obispo, Calif. and surrounding communities, highlighted the legacy of California’s mountain of gold and the environmental hazard leftover from the intense mining of the era. The articles reminded me of a 2013 report1 in USA Today about the findings of high levels of mercury in sites along the California’s Yuba River. While mercury emissions and environmental contamination is not a new topic, I was surprised to learn that the origins of the mercury were traced to the immense piles of Gold Rush-era mining debris in the river valley.  As one subject is often interwoven with another, I eventually found myself digging up mining practices of 1848, sifting through fact sheets explaining mercury’s various forms and health effects, and finally examining statistics and perspectives on how researchers are addressing mercury contamination today.

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Tags: Interest Stories

Part III – Gold Rush: Mercury and its Various Forms

Posted by Jason Davis on Oct 28, 2014 2:04:00 PM

Part III – Gold Rush: Mercury and its Various Forms

In part two of our Mercury blog post, we described Mercury and provided some initial details on the various forms of the element. In this post, we will go into more detail elemental, inorganic and organic forms of mercury.

Elemental Mercury

Mercury in elemental form is a silver-colored liquid that remains liquid at room temperature. Inorganic mercury is mined and processed to generate elemental mercury[i]. It is poorly absorbed by ingestion and contact with skin, and ingested elemental mercury is not absorbed in significant quantities[ii]. Because elemental mercury is absorbed slowly, a majority of it passes the digestive system without doing significant harm.

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Tags: mercury

Tungsten Carbide Production and Quantification of Purity using a DC Arc Spectrometer

Posted by Jason Davis on Aug 4, 2014 12:55:31 PM

Tungsten Carbide (also called cemented carbide or simply carbide) is a metal composite created from tungsten carbide and a binder metal (usually cobalt or nickel) in powder form that is compacted and sintered in a furnace. Tungsten Carbide is used for tools, abrasives, jewelry, industrial drills, and armor-piercing ammunition due to its exceptional hardness (8.5-9.0, surpassed only by diamonds). Because the tungsten carbide particles are captured in a binder during the sintering process, the result is referred to as “cemented”.

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Tags: Teledyne Leeman Labs, Prodigy DC Arc Spectrometer, High-Purity WC

Copper Ore to High-Purity Copper, and the Quantification of Purity

Posted by Jason Davis on Jul 22, 2014 8:54:14 AM

Modern copper ores contain less than 0.6% copper, and less than 2% total volume of economic ore minerals (including copper). A majority of the ore is comprised of unwanted rock and gangue minerals (typically silicate minerals or oxide minerals). Separation of ore minerals from gangue minerals entails complicated and labor intensive processes.

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Tags: Teledyne Leeman Labs, Prodigy DC Arc, High-Purity Copper, Determination of Trace Elements, Sulphur in High-Purity Copper, Grade 1 Cathode Copper, Cu

Moving Forward: Re-Envisioning Our Blog Content

Posted by Jason Davis on Oct 2, 2013 10:37:00 AM

We are happy to announce some dynamic changes in our blog content.  Simply put, it was time for a change of philosophy and a fresh start. While our blog has always been a valuable resource for technical information, we recognized an opportunity to expand its subject matter, increase frequency, and ultimately create a more diverse, more useful forum.  After all, we want users like you to benefit from its content, encounter something truly thought provoking, and come away with something valuable. We want you to return for the next post, and above all, we hope we move you to comment and participate in the discussion!

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Tags: Blog Introduction