Full
Outline
To establish rapid prediction models for multiple nutritional component indexes in nanostructured lycopene liquid beverages by near-infrared spectroscopy (NIRS) combined with chemometrics.
NIRS coupled with partial least squares regression (PLSR) was adopted, and a combined pretreatment optimization strategy was proposed. Rapid quantitative analysis models were constructed separately for key indexes including lycopene, soluble solids, acidity and moisture content in 3 types of samples: lycopene liquid stock solution, nanostructured mannan-modified lycopene liquid beverage and nanostructured dextran-modified lycopene liquid beverage. Model performance was comprehensively evaluated byroot mean square error (RMSE), residual predictive deviation (RPD) and relative error ratio (RER).
After optimized by combined pretreatment, the multi-index quantitative models of the 3 kinds of nanostructured lycopene liquid beverages all showed favorable predictive performance. The model of lycopene liquid stock solution was the best overall, with the test set RMSE of 0.9279, RPD of 5.3659 and RER of 18.3682; the test set RPD of the model for nanostructured mannan-modified samples were 4.7333, respectively; the test set RPD of the model for nanostructured dextran-modified samples were 3.4823, respectively. All models had RPD greater than 3.0, with high prediction accuracy and strong stability, which could realize the simultaneous and rapid quantification of lycopene, soluble solids, acidity and moisture content.
In summary, NIRS combined with chemometrics can effectively detect multiple key indexes in nanostructured lycopene liquid beverages, meet the demand for rapid detection in actual production, and provide efficient technical support for the quality control of such products.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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