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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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A Milestone in Pesticides Analysis for Orbital Trap Mass Spectrometry

  
  
  
  
  
  

Testing Total Acids in Wine Using Automated Photometric Methods

  
  
  
  
  
  
analysis of tartaric acid in wine samples

Here, in my first post on the advantages of using discrete photometric analyzers, I will be addressing the challenges of testing wine elements that contribute towards the taste of a good wine. Typically, wine drinkers look for a robust mouth experience which is the result of amount of acidity in wine, one of its most appealing characteristics and which complements foods in a palate-cleansing manner (link to page on totalwine.com). If a wine is too low in acid, it tastes flat and dull; too high in acid and it is tart and sour. Natural acids, such as tartaric, malic, and citric have the freshest, purest acid tastes. Fermentation acids, like lactic and acetic, add milder, complex flavors. Since acidity greatly influences the taste of wine, winemakers need to understand the role that each of the various acids plays during fermentation and production to ensure an end product with great lasting flavor. Common methods for determination of acids can be accessed in AOAC Official Methods of Analysis 945.08, 950.15, 962.12 (19th edition).

Australia Recalls Tonic Water – The Hazards of Food Mislabeling

  
  
  
  
  
  
analysis of quinine in tonic water

Earlier this month I read that Australia has recalled Indian Tonic Water (link to story) as some of the tonic water bottles were mislabeled as soda water and, hence, the labels did not include information on presence of quinine in the beverages; both Australia and the EU require that the presence of quinine in such beverages be declared. Indeed, the UK's SCHEDULE 8: MISLEADING DESCRIPTIONS states that "The name “Indian tonic water” or “quinine tonic water” shall not be applied to any drink unless the drink contains not less than 57 mg of quinine (calculated as quinine sulphate B.P.) per litre of the drink.

Arsenic Speciation in Rice: Fast & Simple Analysis Using IC-ICP-MS

  
  
  
  
  
  
inorganic arsenic speciation in rice

In my previous blog titled: Arsenic Speciation: The Media and the Science (link to blog post) I promised updates on this hot topic and as a big plus for me personally, this review incorporates my passion for ion analysis. My previous discussion points highlighted the importance of measuring the inorganic arsenic species, commenting on upcoming regulations and the ongoing research at the Institute for Global Food Security at Queens University Belfast (QUB) (link to website) and here I wanted to share the very latest analytical method on the subject published just last month.

Hydrophobic Interaction Liquid Chromatography: Sorting Through the Hype

  
  
  
  
  
  
Hydrophobic Interaction Liquid Chromatography or HILIC

In my 25 years in the chromatography industry, I have seen tremendous improvements in daily laboratory workflow through the years, in many cases, due to revolutionary products developed to save time and money for the researcher and provide more accurate and reproducible results day after day.  I know how difficult it is to stay current and sort through all the new developments in the industry especially while you’re trying to execute daily activities.  There is little time to explore all the new tools and techniques presented, and it’s hard to know which ones will benefit you. My goal, in this and future blog posts, is to discuss and provide resources on the latest tools and techniques that will help you improve and speed up your day-to-day work in the lab.

Is Your Wine Authentic: An Ion Chromatography Method

  
  
  
  
  
  
authenticating wine

On the agenda of the recent UK Laboratory of the Government Chemist (LGC) meeting I attended was a fascinating talk titled: Wine Fraud – Catching the Cheats (link to downloadable pdf of the talk) by renowned wine expert Geoff Taylor (link to profile) of Campden BRI. Although Geoff’s does not discuss Ion Chromatography (IC), his abstract has some startling facts where fraud could potentially make serious money for the criminals, ranging from the fine wine market where volume is low and unit prices are high through to the mass volume market.

ICP-MS Arsenic Speciation in Rice: The Media and The Science

  
  
  
  
  
  
quantification of inorganic arsenic in rice

Recently I watched a very thought provoking documentary by Dispatches on Channel 4 here in the UK which was all about arsenic in rice and rice products (link to U.S. FDA page). As I have a keen interest in ion analysis, I was intrigued to see if the science is consistent with the media story, so took on some research of my own.

Food Testing Using High Resolution LC-MS/MS: A Case Study at RIKILT

  
  
  
  
  
  
lc-ms ms pesticides analysis

Just watched a great 5 minute video which gave an overview on how high performance liquid chromatography (HPLC) coupled to High Resolution Accurate Mass (HRAM) mass spectrometry can help customers challenged with monitoring analytes such as pesticides and veterinary drugs in food and feed samples.

Pesticides Analysis with High-Resolution Accurate Mass Spectrometry

  
  
  
  
  
  
high resolution mass spectrometry, HRAM, high resolution accurate mass, pesticide, veterinary drug, orbitrap, LC-MS, LC-MS/MS

Liquid chromatography with triple quadrupole mass spectrometry (LC-MS/MS) is considered the gold standard for screening and quantitation of pesticides in various food matrices. However, high-resolution accurate mass (HRAM) LC-MS/MS is growing in popularity, in part because it allows for retrospective analysis on additional analytes of interest and screening for unknown or unexpected pesticides is possible. This is because all ions can be collected and fragmented whereas triple quadrupole mass spectrometry requires a target list of compounds. Furthermore, method development time is often shorter by orders of magnitude with HRAM LC-MS/MS, enabling the screening of a large number of compounds compared to triple quadrupole mass spectrometers.

Pomegranate Juice Fraud: HPLC Detects What's in Your Juice!

  
  
  
  
  
  
Pomegranate Juice adulteration testing

Did you know that a peer-reviewed study, titled, International multidimensional authenticity specification (IMAS) algorithm for detection of commercial pomegranate juice adulteration, (link to study), published in the J Agric Food Chem journal, found that only 35% of the commercially available pomegranate juice qualifies as authentic pomegranate juice?

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