Teledyne Leeman Labs Blog

Analyzing Beverages for Mineral and Heavy Metal Conten

Posted by Betsey Seibel on Aug 5, 2016 3:23:11 PM

Teledyne Leeman Labs recently used its Prodigy7 ICP-OES to analyze beverages for mineral and heavy metal content. The goal of the analysis was to demonstrate the effectiveness of the system and method in measuring mineral and heavy metal content in a variety of beverage samples. The results of the analysis were compared with the drinking water standards established by the U.S. Environmental Protection Agency and the World Health Organization.

 

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Tags: mercury analysis

Peru’s Mercury Emergency

Posted by Betsey Seibel on Jul 26, 2016 11:58:18 AM

Illegal gold mining operations in Peru have forced the Peruvian government to declare a state of emergency for the next two month. While the gold is valuable, the extracted process from surrounding areas has created a major health problem for local residents.

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Tags: mercury

Introducing the Prodigy Plus Inductively Coupled Plasma – Optical Emission Spectrometer

Posted by Betsey Seibel on Jul 20, 2016 3:05:55 PM

Leeman Labs is a pioneer in the ICP spectrometry industry, and we were the first to use an Echelle spectrometer for ICP-OES. Recently we added our new Prodigy Plus High Dispersion ICP Spectrometer to our family of ICP-OES instruments. The Prodigy Plus builds upon our legacy and experience, while incorporating new state-of-the-art technology.

 

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Tags: ICP-OES

Department of Energy Wants New Research and Technology to Fight Mercury Contamination

Posted by Betsey Seibel on Jul 6, 2016 4:40:23 PM

The U.S. Department of Energy (DOE) has released a new plan to address the Environmental Management (EM) challenge of mercury contamination at two sites in Tennessee and South Carolina. The plan “advocates for research and the development of technologies that could resolve key technical uncertainties with mercury in environmental remediation, the deactivation and decommissioning of facilities, and processing waste in tanks.”

 

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Tags: mercury analysis

Citrus Peels and Waste Sulfur Key to New Mercury Absorbing Polymer

Posted by Betsey Seibel on May 17, 2016 10:30:00 AM

Citrus_fruit.jpgA research team at Flinders University in Australia has “developed an inexpensive, non-toxic polymer that can absorb hazardous mercury compounds out of water and soil.” The secret ingredient of the polymer is a colorless liquid hydrocarbon that is extracted from the peel of citrus fruits such as lemons, limes and oranges. The process to extract limonene, which gives citrus fruits their smell, includes centrifugal separation and steam distillation.

 

According to a paper published in the journal Angewandte Chemie International Edition, limonene is combined with an equal mass of molten sulfur and synthesized to form a sulfur-limonene polysulfide compound. The two-phase mixture becomes a single, dark red phase upon reaction. The mixture turns a bright yellow in the presence of mercury.

 

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Tags: mercury analysis

Mercury Levels in Precipitation Trending Up Across North America

Posted by Betsey Seibel on May 12, 2016 4:18:10 PM

Stack_with_Big_Plume.jpg

While mercury levels in rainfall and other forms of precipitation have fallen along the East Coast, other sites in the center of North America are reporting increased levels of the toxic element, pushing overall trends for the continent in a positive direction.

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Tags: mercury analysis

What are CVAA Mercury Analyzers Systems?

Posted by Betsey Seibel on Mar 18, 2016 4:07:46 PM

In a previous blog post, we wrote about Cold Vapor Atomic Absorption Spectroscopy, a primary technique for mercury analysis. In this post, we will describe Teledyne Leeman Labs’ instruments that facilitate the process.

 

Leeman Labs offers two CVAA systems; the Hydra IIAA, an entry-level CVAA system that can detect mercury limits of less than 5.0 ng/L with a usable range of 5 ng/L to 1 mg/L; and the QuickTrace M-7600 CVAA Mercury Analysis System, which is a dual beam system capable of ultra-trace detection limits of less than 0.5 ng/L.

 

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Tags: CVAA

Scientist Complete 7th Row of Periodic Table

Posted by Betsey Seibel on Jan 26, 2016 1:07:35 PM

Scientists from Japan, Russia and America recently made all science textbooks obsolete when the four new elements they discovered were officially added to the periodic table, completing the 7th period of the table of elements. The first elements added to the table since 2011 were verified by the U.S.-based International Union of Pure and Applied Chemistry (IUPAC), the global organization responsible for governing chemical nomenclature, terminology and measurement.

 

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Tags: Periodic Table

Getting to Know Leeman Labs CVAFS and Direct Analysis Combustion Mercury Analyzer

Posted by Betsey Seibel on Jan 18, 2016 11:30:00 AM

Teledyne Leeman Labs offers a family of fully automated mercury analyzers that address the analysis of solids, semi-solids and liquids. Our high performance instruments help lab technicians, chemists and lab managers to complete the myriad of task required in today’s modern laboratories.

 

We recently released a Practical Guide for Selecting the Best Technique for Mercury Measurement where we describe in detail each of our mercury analyzers and how they work. In a previous post, we covered our two CVAAS systems. Below is a summary of the information included in the guide about Leeman Lab’s Cold Vapor Atomic Fluorescence Spectroscopy and Direct Analysis Combustion systems. The complete guide can be downloaded at TeledyneLeemanLabs.com.

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Tags: CVAF, Combustion

What is Cold Vapor Atomic Absorption (CVAA) Spectroscopy?

Posted by Betsey Seibel on Jan 13, 2016 4:03:00 PM

Cold Vapor Atomic Absorption Spectroscopy or CVAAS is one of the primary techniques for mercury analysis. Introduced in 1968 by Hatch and Ott, CVAAS is now the reference method for drinking water monitoring under the Safe Drinking Water Act passed in 1974, and amended in 1986 and 1996. The technique was introduced to the market following the first commercially available atomic absorption spectrometer, which measures quantities of chemical elements present in environmental samples.

 

Atomic Absorption Spectrometry (AAS) determines the quantities by “measuring the absorbed radiation by the chemical element of interest. This is done by reading the spectra produced when the sample is excited by radiation.”[i] CVAAS was born when Hatch and Ott used an attachment for a flame atomic absorption spectrophotometer that enabled the reduction of Hg2+ in a solution to ground state atoms (Hg0). The ground-state mercury atoms were then transported to an optical cell and detector for measurement. Shortly after Hatch and Ott introduced the technique to the market, the United States EPA adopted CVAAS for the determination of mercury in water, soil and fish.

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Tags: CVAA