Determination of inulin in meat products by high-performance liquid chromatography with refractive index detection.
Inulin is a naturally occurring carbohydrate with beneficial nutritional and technological properties. A high-performance liquid chromatographic (HPLC) method was developed for the quantitative determination of these beta-fructans in meat products, containing this type of additive. The method includes extraction of inulin with hot water, followed by hydrolysis with inulinase enzyme, and determination of the released fructose by HPLC with refractive index detection. An internal standard of rhamnose was used to quantify fructose. The method incorporates a sample blank (without inulinase hydrolysis) for each specimen to subtract contributions of free fructose and fructose from sucrose. The results showed good precision with average RSDs of 2.4% for repeatability and 5.2% for reproducibility. Analytical recovery ranged from 102 to 106%. Satisfactory linearity (r=0.999) was obtained.
Vendrell-Pascuas
S
S
Departament Nutrició i Bromatologia, Centre de Referència en Tecnologia dels Aliments (CeRTA), Facultat de Farmàcia, Universitat de Barcelona, Spain.
Castellote-Bargalló
A I
AI
López-Sabater
M C
MC
D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D007444:Inulin / Q000032:analysis*; D008461:Meat Products / Q000032:analysis*; D012031:Refractometry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D007444:Inulin