Semiautomatic Flow-Injection Method for Determination of Volatile Acidity in Wines
نویسندگان
چکیده
منابع مشابه
Semiautomatic flow-injection method for determination of volatile acidity in wines.
A flow-injection (FI) method based on analytical pervaporation was assessed for its routine use in the determination of volatile acidity in winery laboratories. The new method was compared with both the official method and the Mathieu method, which is most often used in Spanish wineries, by testing 30 different wines, including young and aged, and sweet and dry wines from Montilla-Moriles appel...
متن کاملSequential determination of titratable acidity and tartaric acid in wines by flow injection spectrophotometry
A flow injection manifold is proposed for the sequential determination of titratable (total) acidity based on a pseudotitration and of tartaric acid based on the formation of a coloured vanadate complex. The method involves in-line dialysis prior to injection to avoid interference from the sample background absorption in the spectrophotometric detection. The changes in the colour of both reacti...
متن کاملSpectrophotometric Flow- Injection Method for Determination of Sorbic Acid in Wines
A simple, rapid, and accurate spectrophotometric flow-injection method was developed for the determination of sorbic acid in wines based on the oxidation of sorbic acid with K2Cr2O7/H2SO4 at 1008C, followed by reaction of the resulting malonaldehyde with thiobarbituric acid, also at 1008C, to give a red product, the absorbance of which is measured at 532 nm. The method requires no prior distill...
متن کاملDetermination of Total Antioxidant Activity of Wines Using a Flow Injection Method with Chemiluminescence Detection
Total antioxidant capacity (TAC) of several samples of red and white wines was investigated by means of a new analysis method of flow injection with chemiluminescence detection ((FIA-CL). The applied method is based on a chemiluminescence reaction between luminol and hydroxyl radicals generated by the hydrogen peroxide in the presence of Co(II) ions complexed with ethylene diamine tetraacetic a...
متن کاملMethod for the simultaneous determination of total polyphenol and anthocyan indexes in red wines using a flow injection approach.
A simultaneous and fast method for the determination of total polyphenol index (t.p.i.) and total anthocyan index (t.a.i.) has been developed by a flow injection approach and a diode array spectrophotometer for monitoring at 280 and 520 nm, respectively. Linear ranges were obtained from 20 to 70 index units and from 20 to 500 mg l(-1) for the t.p.i. and t.a.i., respectively. The results provide...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of AOAC INTERNATIONAL
سال: 2001
ISSN: 1060-3271,1944-7922
DOI: 10.1093/jaoac/84.6.1846