Determination of nitrates in vegetables by capillary isotachophoresis

✍ Scribed by Karovičová, J. ;Polonský, J. ;Drdák, M. ;Príbela, A.

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 104 KB
• Volume: 34
• Category: Article
• ISSN: 0027-769X
• DOI: 10.1002/food.19900340822

✦ Synopsis

The presented paper deals with the determination of nitrates by capillary isotachophoresis. The determination was tested on vegetable samples bought in the shop and the market hall.

High nitrates concentration in vegetable is mainly due to excessive nitrogen content in the soil system, thus deteriorating the nutritional and hygienic values of products and complicating the processing and storage. Hence, increased attention is paid to nitrates not only by medical staffs, especially by hygienists, but also by farmers, nutritionists and, to a certain degree, also by consumers.

At present, various analytical methods are used to determine nitrates in biological material, such as the spectrophotographic and potentiometric methods. Nitrates may also be estimated by polarography, atomic absorption spectrophotometry, gas chromatography, high performance liquid chromatography and capillary isotachophoresis (ITP) [ 1-31.