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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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Chromatography Analysis of Additives & More in Beverages (II)

  
  
  
  
  
  
analysis of additives in beverage

After last month's post featuring chromatography applications for the analysis of sugars and artificial sweeteners in beverages (link to post), I am pleased to present two more application notebooks for the analysis of beverages, one for the analysis of carbonated beverages and the other for the analysis of additives in beverages.

Chromatography Analysis of Sugars & Sweeteners in Beverages (I)

  
  
  
  
  
  
chromatography sugars in beverages

Have you been following the increasing efforts by various governments to regulate the amount of sugar in beverages or impose sugar taxes on sugary drinks in an effort to reduce sugar in food and beverage products? In one story, UK's chief medical officer told a committee of MPs that a sugar tax may have to be introduced to curb obesity rates (link to story) and in another story, the state of Illinois, in the USA, is considering a new tax on sugary beverages (link to story). By the way, a new study concluded that fruit juice has only a bit less fructose than sugary sodas (link to study).

Why Settle for Cr(VI) 20 ppt When You Can Get 1 ppt in Half the Time?

  
  
  
  
  
  
hexavalent chromium testing

I know the title does not sound as one of our typical titles but I thought I would focus on the test results rather than the technology for once. By the way, did you know that it has already been more than two years ago since we first alerted you on new detection limits for hexavalent chromium (the topic is the subject of the blog post: Ion Chromatography Analysis of Hexavalent Chromium) and how the U.S. EPA has used our ion chromatography technology to develop the U.S. EPA Method 218.6 way back in 1991 for the determination of Cr(VI) in drinking water.

GC-MS & GC-ECD Methods for Pesticides in Fruit & Tea Research Studies

  
  
  
  
  
  
gc-ecd pesticides in tea

Here, I am pleased to present two research studies describing the use of gas chromatography-mass spectrometery (GC-MS) and gas chromatography-electro capture dectectorchemical (GC-ECD) for the analysis of pesticides in strawberries and tea respectively. Sounds like a lovely English afternoon doesn't it except for the pesticides bit. Did you know that 80% of the strawberries in the United States are supplied by one state, that is, California? Here's a comprehensive read on all you ever wanted to know about strawberries from how they are grown, why are they getting bigger and yet less flavorful, and what organic strawberries actually mean: The Secret Life Of California's World-Class Strawberries (link to article).

Too Much Data on your Plate? LIMS to the Rescue.

  
  
  
  
  
  
Too Much Data on your Plate? LIMS to the Rescue.

The food supply chain has become a complex global system consisting of small to large domestic and foreign manufacturers, processors, packers, distributors and transporters with few common business practices. Consumers now expect year-round supplies of fresh fruits and vegetables as well as more the more exotic, including processed  foods. This has increased the risk of a major food safety incident. Compliance with differing government regulations and enforcement policies adds to the complexity. With such a wide-spread value chain with multifaceted reporting requirements, the challenges are great for consumer-facing suppliers to demonstrate regulatory compliance and protect their brands. Laboratory information management systems (LIMS) play a key role in brand protection by facilitating end-to-end traceability of products and all associated laboratory processes.

Chromatography Solutions for Analysis of Milk

  
  
  
  
  
  
hplc milk analysis
How this blog post on the chromatography analysis of milk and milk products came about was the featuring of the following two fascinating stories on our twitter stream and our Chromatography Solutions Facebook page on the topic:
  • Did you know that before refrigeration, people in Russia and Finland dropped live brown frogs into milk to keep it fresh? Moscow State University researchers discovered the science behind this odd custom; they found that amphibians' skin secretions are filled with peptides, which are antimicrobial compounds that are as effective against Salmonella and Staphylococcus bacteria as prescription antibiotics. 
  • The ability of geographically diverse Africans to digest milk has been linked to spread of cattle raising. Researchers found that the ability to digest milk became a selective force in the populations that raised cattle and consumed fresh cow, camel, or goat milk and identified three additional genetic variants with lactase persistence that had not been identified previously. By the way, it was the largest ever study of its kind in Africa.

In our 90-plus page Beverages Applications Notebook: Milk (downloadable PDF), we present applications for monitoring the compositional quality and safety of milk and milk products such as baby formula, lactose-free milk products, and milk for tracking contamination, adulteration, product consistency, and to ensure regulatory compliance.

LC-MS Solutions for Analysis of Marine Biotoxins in Shellfish

  
  
  
  
  
  
hplc analysis of marine biotoxins in shellfish

Did you know that marine biotoxins resulting from algal blooms can accumulate in bivalve mollusks as these organisms filter large quantities of water and can poison human beings who consume the mollusks? For example, in the State of New York (USA), one can check the sanitary conditions of shellfish lands and find out if they are closed for shellfish collection (link to site). Studies have shown that phosphorus in agricultural fertilizer is the primary cause of toxic algal blooms, as in the Great Lakes in the USA (link to article).

Novel HPLC Approaches for Carbohydrate Analysis in Beverages & Food

  
  
  
  
  
  
Carbohydrate Analysis in Beverages & Food

Recently, we partnered with FoodProductionDaily.com to present a webinar on the use of universal Charged Aerosol Detection and selective pulsed amperometric detection for the direct determination of carbohydrates in complex food and beverage matrices. The advantages of two novel approaches, HPAE-PAD and HILIC-CAD was also discussed. The attendees asked several interesting questions on the types of detection and I thought they would make for good reading along with a couple of other resources.

HPLC Method Speeds Analysis of Polycyclic Aromatic Hydrocarbons

  
  
  
  
  
  
analysis of polycyclic aromatic hydrocarbons in water

I am pleased to present a recently released high-performance liquid chromatography method to determine 20 polycyclic aromatic hydrocarbons (PAHs) in environmental waters using online solid-phase extraction (SPE) for sample preparation. This approach moves the offline sample preparation procedures of U.S. EPA Method 550 and EPA Method 550.1 online to save time and labor.

Ion Chromatography: Analysis of Crayfish Wash Powder

  
  
  
  
  
  
analysis of food processing contaminants

Did you know that the washing powder used to clean crayfish and shrimp and make them more attractive for sale is toxic and has been linked to rhabdomyolysis, a serious condition in which muscle fiber contents (myoglobin) are released into the bloodstream causing damage to the kidneys? (Link to story). The wash powder consists of thiosulfate and phosphate-related compounds, such as pyrophosphate, and has been banned by the Shanghai Food and Drug Administration (link to story).

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