Seward Limited Release: Stomacher® Contributes to On-Going Cosmetic Product Safety Campaign  
8/15/2012 10:18:58 AM

Worthing, UK – 15 August 2012 – Seward Limited has announced the application of its patented Stomacher paddle blender range in a newly developed analytical protocol for cosmetics product safety. Mercury in cosmetic products, such as face creams, has been illegal in the US and EU for many years, but its presence in imported products remains a potential problem. The hidden dangers of imported products contaminated with toxins has become a focus of public health professionals concerns. Consequently, researchers at San Francisco State University, California Department of Public Health and The FDA combined to devise test protocols for detection of mercury in imported face cream products1.

The method developed relies on the Stomacher® 80 microBiomaster to prepare standard samples to produce a calibration curve for a technique applying X-Ray fluorescence. Measured quantities of mercury sulphide were suspended in a Carbomer® 940 matrix, an emulsion designed to suspend particulate materials and homogenised using the Stomacher. The results of the programme fully support the methodology developed for product screening.

The Stomacher® laboratory paddle blender range is extensively used in cosmetic and pharmaceutical quality control and development. It has also been used in small scale production of topical therapeutic and cosmetic products in development projects. The familiar benefits of Stomacher blending with the sample contained in a sterile plastic bag and the blender never contacting the sample eliminates the risk of cross contamination. It also allows small scale batch processing without losing sample in the blender mechanism or producing aerosols.

A full copy of the abstract is available on request at


[1] COMPARISON OF XRF, TXRF, AND ICP-MS METHODS FOR DETERMINATION OF MERCURY IN FACE CREAM Peter T. Palmer, San Francisco State University; Gordon Vrdoljak, California Department of Public Health; Richard Jacobs, Food and Drug Administration

About Seward Limited -

Seward manufactures the world leading range of Stomacher® paddle blenders and Stomacher® accessories used in sample preparation for microbiological analyses. The company has been manufacturing and developing the world renown and patented Stomacher® Lab Blender for 40 years. The original and still regarded as the best, over 8 million food samples a day are prepared on Stomacher® 400 paddle blender units around the world.

In addition to sample preparation for food safety analyses, within the bioscience market the new developments of the Stomacher® 80 and micro 80 are proving invaluable for safe and efficient sample processing. The Stomacher® 3500 has established itself as the instrument of choice for preparing samples for the new pathogen test protocols requiring jumbo size samples.

The company is based in Worthing, West Sussex, UK with subsidiaries in Long Island, N.Y., USA and Singapore. All Seward machine products are manufactured within the UK and 1 of its 3 worldwide Stomacher® bag manufacturing operations is also UK-based. This ensures control of quality and price to deliver excellent value to global trading partners and laboratory customers.

Seward Limited continues to develop the product range, now with 3 patents to its credit. Stomacher® is the most highly referenced brand name in food safety and life science sample preparation in scientific publications. The company also assists customers with method development through reference searches and sample evaluations within its own development laboratory.

The original and still the best. The Stomacher® - a Seward product trade name.

Seward contact details:

Europe and ROW: +44 (0) 1903 823077;

US & Canada: +1 772 621 8220;

Asia, Pacific and Middle East: +65 67447811;