A Comparison of Result Reliability for Investigation of Milk Composition by Alternative Analytical Methods in Czech Republic
| العنوان: | A Comparison of Result Reliability for Investigation of Milk Composition by Alternative Analytical Methods in Czech Republic |
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| المؤلفون: | Petr Roubal, Gustav Chládek, Jan Říha, Oto Hanuš, Radoslava Jedelská, Eva Samková, David Ledvina, Josef Kučera, Jaroslav Kopecký |
| المصدر: | Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, Vol 62, Iss 5, Pp 929-937 (2014) |
| بيانات النشر: | Mendel University Press, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Alternative methods, Coefficient of determination, Correlation coefficient, Chemistry, adjustation, Analytical chemistry, lcsh:S, Standard deviation, indirect method, lcsh:Agriculture, chemistry.chemical_compound, lcsh:Biology (General), reference method, milk composition, Gravimetric analysis, cow raw milk, Composition (visual arts), analytical result reliability, Lactose, General Agricultural and Biological Sciences, Kjeldahl method, lcsh:QH301-705.5 |
| الوصف: | The milk analyse result reliability is important for assurance of foodstuff chain quality. There are more direct and indirect methods for milk composition measurement (fat (F), protein (P), lactose (L) and solids non fat (SNF) content). The goal was to evaluate some reference and routine milk analytical procedures on result basis. The direct reference analyses were: F, fat content (Röse–Gottlieb method); P, crude protein content (Kjeldahl method); L, lactose (monohydrate, polarimetric method); SNF, solids non fat (gravimetric method). F, P, L and SNF were determined also by various indirect methods: – MIR (infrared (IR) technology with optical filters), 7 instruments in 4 labs; – MIR–FT (IR spectroscopy with Fourier’s transformations), 10 in 6; – ultrasonic method (UM), 3 in 1; – analysis by the blue and red box (BRB), 1 v 1. There were used 10 reference milk samples. Coefficient of determination (R2), correlation coefficient (r) and standard deviation of the mean of individual differences (MDsd, for n) were evaluated. All correlations (r; for all indirect and alternative methods and all milk components) were significant (P ≤ 0.001). MIR and MIR–FT (conventional) methods explained considerably higher proportion of the variability in reference results than the UM and BRB methods (alternative). All r average values (x minus 1.64 × sd for 95% confidence interval) can be used as standards for calibration quality evaluation (MIR, MIR–FT, UM and BRB): – for F 0.997, 0.997, 0.99 and 0.995; – for P 0.986, 0.981, 0.828 and 0.864; – for L 0.968, 0.871, 0.705 and 0.761; – for SNF 0.992, 0.993, 0.911 and 0.872. Similarly MDsd (x plus 1.64 × sd): – for F 0.071, 0.068, 0.132 and 0.101%; – for P 0.051, 0.054, 0.202 and 0.14%; – for L 0.037, 0.074, 0.113 and 0.11%; – for SNF 0.052, 0.068, 0.141 and 0.204. |
| اللغة: | English |
| تدمد: | 2464-8310 1211-8516 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4dd7afd7ff75100ffe6d1408875a8db https://acta.mendelu.cz/62/5/0929/ |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....b4dd7afd7ff75100ffe6d1408875a8db |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24648310 12118516 |
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