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A blog on the latest applications, articles, & research on chromatography solutions in sample preparation, Ion Chromatography (IC),
High Pressure Liquid Chromatography (HPLC), Ion Chromatography-Mass Spectrometry (IC-MS), Gas Chromatography (GC),
Gas Chromatography-Mass Spectrometry (GC-MS and GC-MS/MS), and software (Chromeleon CDS, LIMS, and ProteinCenter).

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GC-MS/MS Improves Detection of Low-Level Dioxins in Food & Feed

  
  
  
  
  
  
analysis of low levels of dioxins in food

Did you know that more than 90% of human exposure to highly toxic dioxins is through food, mainly meat and dairy products, fish and shellfish? (Link & source WHO page on dioxins.) A little about dioxins in case you are not familiar with these chemicals. Dioxins are a group of chemically-related compounds, including polychlorinated dibenzodioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and some dioxin-like polychlorinated biphenyls (PCBs) which are formed by waste incineation, forest fires, and backyard trash burning. These compounds are classified as persistent organic pollutants (POPs) as they are highly toxic and bioaccumulate in food chains, mainly in the fatty tissues of animals. Exposure to dioxins is known to cause developmental problems, damage to the immune system, dysregulation of hormone levels and cancer.

HPLC Simplifies Analysis of Artificial Sweetner Acesulfame in Vinegar

  
  
  
  
  
  
analysis of acesulfame potassium by hplc

I found the HPLC application, briefly discussed in this blog post, for the analysis of a synthetic sweetener called Acesulfame or Acesulfame K in vinegar fascinating as I had no idea that it is extensively used as a sugar substitute in foods and beverages. Some food regulatory bodies, such as The Standardization Administration of China allows Acesulfame to be added to fermented vinegar products, but limits the added amount to no more than 4 µg/mL. Therefore, an efficient method is needed to sensitively and rapidly determine Acesulfame in fermented vinegar. By the way, Acesulfame is 200 times sweeter than sucrose.

Gas Chromatography Analysis of Methane & Carbon Dioxide in Beer Waste

  
  
  
  
  
  
analysis of spent brewers grain

Did you know that the world beer consumption was 187.37 million kiloliters in 2012  and China remains the largest beer-consuming country for the 10th year running? (Source and link to Kirin Beer University Report.) The challenge remains of dealing the spent brewer's grain used to produce beer, and typically, over 300,000 tonnes of this spent grain is produced annually. While it is used successfully as an animal feedstock, the spent grain deteriorates rapidly due to its high humidly and fermenting sugar content. In the gas chromatography research study, presented in this post, researchers present novel methods for drying the spent grain by using the bio-energy generated from the anaerobic digestion of the spent grain in the same brewery!

HPAE-PAD Speeds Analysis of Carbohydrates in Beverages & Milk

  
  
  
  
  
  
analysis of carbohydrates in apple cider

The ongoing challenge for food regulatory bodies is not just identifying food contamination problems but also making sure that product formulation and product quality meets regulatory standards and food manufacturers report any ingredients that might impact immune-and allergy-sensitive individuals. By the way, did you know that India has banned the import of milk and milk products from China until June 2015 due to concerns of contamination of melamine? And. you can read about our solutions on the analysis of melamine in pet food and milk (link to post) on this blog.

Automated Solid Phase Extraction & GC Analysis of Pesticides in Water

  
  
  
  
  
  
analysis of organophosphate pesticides

Did you know that the U.S. EPA posts annual reports on quality of drinking water by state? (Link to U.S. EPA site.) Does the regulatory entity responsible for monitoring water quality in your country do so? If yes, do share the link to its site in the Comments box below.

GC-MS/MS Provides Powerful Detection of Low-Level Alkylphenols

  
  
  
  
  
  
surfactant analysis using gc-ms

Here, I am pleased to feature a recently released GC-MS/MS method for the detection of  alkylphenol compounds (link to APE Research Council page) in food and environmental matrices.

HPLC Method for Determination of Benzo(a)pyrene in Meat Products

  
  
  
  
  
  
Benzo(a)pyrene in smoked meat

Here, I am pleased to present an efficient HPLC method featuring an improved sample preparation method with fluorescence detection for the sensitive and rapid determination of benzo[a]pyrene (downloadable U.S. EPA factsheet) in complex meat products, such as sausages and preserved ham. 

Accelerated Solvent Extraction: Organochlorine Pesticides in Oysters

  
  
  
  
  
  
sample preparation oyster tissue

Here, I am pleased to feature an improved and fast sample preparation method for challenging matrices, such as a wet animal tissue, for example an oyster sample using our latest dispersant and sorbant copolymer. This polymer was featured in a blog post some weeks ago: Accelerated Solvent Extraction: New Polymer for Wet Samples (link to post).

Gas Chromatography Headspace Analysis of Residual Solvents

  
  
  
  
  
  
analysis of solvents in food packaging

I am pleased to feature a recently released automated gas chromotography method for the analysis of residual solvents in flexible packaging material used for food that not only easily meets the requirements of the European Standard absolute method EN 13628-1: 2002 standard but also provides excellent quantitation results without any sample preparation! (By the way, if you are new to food testing, EN 13628-1: 2002 is the British standard for determining residual solvents by static headspace gas chromatography and applies to flexible packaging materials that consist for mono- or multilayer plastic films, paper or board, foil or combinations thereof.)

HPLC Speeds Determination of Dicyandiamide in Milk Powder

  
  
  
  
  
  
dicyandiamide analysis in milk powder

Here, I am pleased to feature an efficient and simple reliable HPLC method for the monitoring of dicyandiamide levels in milk and milk-derived products; last year, a New Zealand company found traces of this toxic chemical in its milk products (link to story).

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