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Latest App Notes & Case Studies

App Note / Case Study

Analysis of Fatty Acids in Infant Formulas Using a JW HP88 Capillary GC Column

This application note describes an efficient and economical RTL-GC/FID method for determination of fatty acids in infant formulas.
App Note / Case Study

Analysis of Glycerin and Glycerides in Biodiesel (B100) Using ASTM D6584 and EN14105

This application provides complete system configuration as well as guidelines for successful analysis of free glycerin and total glycerides in biodiesel.
App Note / Case Study

Analysis of Ethanol in Blood with Agilent 7820A GC and 7697A Headspace Sampler

This application note supplies a simple, reliable and fast solution that meets the latest national standards for measuring the ethanol content in blood.
App Note / Case Study

Determination of Phytic Acid in Soybeans and Black Sesame Seeds

Phytic acid is a good metal chelator, it is believed to have a negative nutritional impact on strongly chelating metals necessary for good health and could prevent their absorption by the intestine. For this reason and because phytic acid is thought to have a positive dietary impact as an antioxidant to prevent carcinogenesis, determining the phytic acid content of foods is of interest.
App Note / Case Study

HPLC Analysis of Six Active Components of Caulis Lonicerae Using a Phenyl-1 Column

Caulis Lonicerae the dried rattan of Lonicera japonica, is an important traditional Chinese medicine used for the treatment of such ailments as acute fever, headache, respiratory infection and epidermic diseases. The Pharmacopoeia of the People’s Republic of China quality control protocols for Caulis Lonicerae are inconvenient and inadequate.
App Note / Case Study

Mogroside V Determination by HPLC with Charged Aerosol and UV Detections

Luo han kuo fruit has long been used in traditional Asian medicine. Recently cucurbitane-type and other triterpene glycosides have been isolated from the fruit and investigated for numerous potential health benefits such as antioxidant activity, anticancer and antihyperglycemic effects. Many of these compounds are intensely sweet and therefore have also been investigated as sugar substitutes and flavor enhancers.
App Note / Case Study

Measuring Lactose in Milk: A Validated Method

Measurement of lactose, the major carbohydrate in milk, is important because it contributes to the sensory and functional properties of milk and has economic value since the price of milk is based on milk solids content. The lactose content of cow's milk can vary from 3.8–5.3% with modern 1% and 2% milk products having higher levels of lactose. The AOAC Official Method for determination of lactose in milk is both complex and time consuming.
App Note / Case Study

Determination of Trace Sodium in Cranberry Powder

The number of consumers taking dietary supplements has increased significantly within the past decade. In 2010, dietary supplements grew about 4.5% to reach a total sales of nearly $28 billion. Therefore, the quality and safety of these products is critical and must be verified and maintained.
App Note / Case Study

Determination of Mono-, Di-, and Triphosphates and Citrate in Shrimp by Ion Chromatography

Polyphosphates are legally added to some food products such as meat, fish, and seafood. In the seafood industry, polyphosphates are used in both fresh and frozen products to increase their water-binding capacity. Polyphosphates are legal, but some countries require that polyphosphate usage be declared and may also limit the amount that can be added.
App Note / Case Study

HPLC Separation of All-Trans-ß-Carotene and Its Iodine-Induced Isomers Using a C30 Column

Many therapeutic functions have been ascribed to carotenoids, though the recognized role of ß-carotene is as the main dietary source of vitamin A. Recently, protective effects of carotenoids against serious disorders such as cancer, heart disease and degenerative eye disease have been recognized.
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