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1. A fast and inexpensive approach to characterize Slovak Tokaj selection wines using infrared spectroscopy and chemometrics

Author:
Machyňáková, Andrea; Schneider, Mateus P.; Khvalbota, Liudmyla; Vyviurska, Olga; Špánik, Ivan; Gomes, Adriano A.
Source:
Food chemistry 2021 v.357 pp. 129715
ISSN:
0308-8146
Subject:
chemometrics,   etc   ; food chemistry; infrared spectroscopy; models; prediction; wines; Hungary; Slovakia;     Show all 8 Subjects
Abstract:
... The Tokaj Selection wines (hungarian equivalent “Aszú”) are typical noble sweet wines produced in Tokaj wine region that falls within two countries, Slovakia and Hungary. Taking into account the economic importance and uniqueness of these wines, in this work, a new, fast and inexpensive method that combines infrared spectroscopy and multivariate models for characterization Slovak Tokaj Selection w ...
DOI:
10.1016/j.foodchem.2021.129715

2. Dynamic monitoring oxidation process of nut oils through Raman technology combined with PLSR and RF-PLSR model

Author:
Wang, Cheng; Sun, Yingying; Zhou, Yanyu; Cui, Yiwen; Yao, Weirong; Yu, Hang; Guo, Yahui; Xie, Yunfei
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2021 v.146 pp. 111290
ISSN:
0023-6438
Subject:
chemometrics,   etc   ; Raman spectroscopy; models; oxidation; peroxide value; prediction;     Show all 6 Subjects
Abstract:
... During preservation of nuts, nut oils are easily oxidized; hence, peroxide value (PV) is an important evaluation index. In this study, a novel method for the determination of the PV of nuts based on partial-least-square regression (PLSR) and Forest random PLSR (RF-PLSR) model was established. Meanwhile, the Raman spectrum was processed by 24 spectral pretreatment methods to transform the whole Ram ...
DOI:
10.1016/j.lwt.2021.111290

3. Geographical traceability and multielement analysis of edible and medicinal fungi: Taking Wolfiporia cocos (F.A. Wolf) Ryvarden and Gilb. as an example

Author:
Yue, JiaQi; Li, ZhiMin; Zuo, ZhiTian; Liao, YiJun; Huang, HengYu; Wang, YuanZhong
Source:
Journal of food science 2021 v.86 no.3 pp. 770-778
ISSN:
0022-1147
Subject:
chemometrics,   etc   ; altitude; food science; models; protected designation of origin; traceability;     Show all 6 Subjects
Abstract:
... Different geographical environment has a certain influence on the accumulation of fungi elements and chemical components. However, our knowledge is limited to elucidate the fungi elements in response to heterogeneous environmental and the quality differences among different habitats. Here, multielement analysis, FTIR spectrum, and feature‐level fusion technique combined with chemometrics were used ...
DOI:
10.1111/1750-3841.15649

4. Determination of soluble solids content and firmness in plum using hyperspectral imaging and chemometric algorithms

Author:
Meng, Qinglong; Shang, Jing; Huang, Renshuai; Zhang, Yan
Source:
Journal of food process engineering 2021 v.44 no.1 pp. e13597
ISSN:
0145-8876
Subject:
chemometrics,   etc   ; algorithms; firmness; fruit maturity; least squares; models; plums;     Show all 7 Subjects
Abstract:
... Hyperspectral imaging technology coupled with chemometric algorithms was investigated to determine soluble solids content (SSC) and firmness in plum. A model of determining SSC and firmness in plum was established and optimized. Hyperspectral images of two varieties of “Red” and “Green” plums were acquired by hyperspectral imaging acquisition system. Two methods of partial least square regression ...
DOI:
10.1111/jfpe.13597

5. Determining the end-date of long-ripening cheese maturation using NIR hyperspectral image modelling: A feasibility study

Author:
Priyashantha, Hasitha; Höjer, Annika; Saedén, Karin Hallin; Lundh, Åse; Johansson, Monika; Bernes, Gun; Geladi, Paul; Hetta, Mårten
Source:
Food control 2021 v.130 pp. 108316
ISSN:
0956-7135
Subject:
chemometrics,   etc   ; cheese ripening; cheeses; data collection; feasibility studies; food safety; hyperspectral imagery; models; prediction;     Show all 9 Subjects
Abstract:
... Near-infrared (874–1734 nm) hyperspectral (NIR-HS) imaging, coupled with chemometric tools, was used to explore the relationship between spectroscopic data and cheese maturation. A predictive tool to determine the end-date of cheese maturation (E-index, in days) was developed using a set of 425 NIR-HS images acquired during industrial-scale cheese production. The NIR-HS images were obtained by sca ...
DOI:
10.1016/j.foodcont.2021.108316

6. Prediction of a wide range of compounds concentration in raw coffee beans using NIRS, PLS and variable selection

Author:
Ribeiro, Juliano Souza; Salva, Terezinha de Jesus Garcia; Silvarolla, Maria Bernadete
Source:
Food control 2021 v.125 pp. 107967
ISSN:
0956-7135
Subject:
chemometrics,   etc   ; caffeine; calibration; food safety; models; multivariate analysis; near-infrared spectroscopy; prediction; trigonelline; variability; wavelengths;     Show all 11 Subjects
Abstract:
... Near infrared spectroscopy coupled to chemometrics has been proposed as a low cost, rapid and eco-friendly methodology in both off-line and on-line analyses of coffee beans and coffee beverages. However, there are some methodological restrictions regarding its use to quantify chemical constituents in raw coffee beans. In this sense, attention can be drawn to the slight variability of the reference ...
DOI:
10.1016/j.foodcont.2021.107967

7. HPLC-DAD fingerprints combined with chemometric techniques for the authentication of plucking seasons of Laoshan green tea

Author:
Peng, Tian-Qin; Yin, Xiao-Li; Gu, Hui-Wen; Sun, Weiqing; Ding, Baomiao; Hu, Xian-Chun; Ma, Li-An; Wei, Shu-Dong; Liu, Zhi; Ye, Shi-Yi
Source:
Food chemistry 2021 v.347 pp. 128959
ISSN:
0308-8146
Subject:
chemometrics,   etc   ; autumn; food chemistry; green tea; high performance liquid chromatography; models; principal component analysis; summer;     Show all 8 Subjects
Abstract:
... Laoshan green teas plucked in summer and autumn were measured by high performance liquid chromatography-diode array detector (HPLC-DAD). After baseline correction, the fingerprints data were resolved by multivariate curve resolution-alternating least squares (MCR-ALS) and a total of 57 components were acquired. Relative concentrations of these components were afterwards applied to distinguish pluc ...
DOI:
10.1016/j.foodchem.2020.128959

8. Geographical traceability of sea cucumbers in China via chemometric analysis of stable isotopes and multi-elements

Author:
Kang, Xuming; Zhao, Yanfang; Liu, Wei; Ding, Haiyan; Zhai, Yuxiu; Ning, Jinsong; Sheng, Xiaofeng
Source:
Journal of food composition and analysis 2021 v.99 pp. 103852
ISSN:
0889-1575
Subject:
chemometrics,   etc   ; Holothuroidea; discriminant analysis; food composition; models; principal component analysis; seafoods; stable isotopes; traceability; China;     Show all 10 Subjects
Abstract:
... Geographical traceability is critical in protection the local characteristic product such as sea cucumbers, which is one of the highly valued seafood in China. Thus, it is urgent to develop some advanced techniques to clearly identify the geographical origins of sea cucumbers. In this work, the potential of data fusion techniques used for the traceability of sea cucumbers in China was evaluated by ...
DOI:
10.1016/j.jfca.2021.103852

9. Rapid Determination of Peroxide Value of Peanut Oils During Storage Based on Terahertz Spectroscopy

Author:
Liu, Wei; Zhao, Pengguang; Shi, Yule; Liu, Changhong; Zheng, Lei
Source:
Food analytical methods 2021 v.14 no.6 pp. 1269-1277
ISSN:
1936-9751
Subject:
chemometrics,   etc   ; absorbance; algorithms; least squares; models; oxidation; peanuts; peroxide value; prediction; principal component analysis; spectroscopy;     Show all 11 Subjects
Abstract:
... Terahertz (THz) spectroscopy was used to evaluate peroxide value (PV) of peanut oils during storage. Genetic algorithm (GA) and principal component analysis (PCA) were used as the pretreatment methods to reduce THz high-dimensional data. Interval partial least square (iPLS), back propagation neural network (BPNN), support vector regression (SVR), and partial least squares regression (PLSR) were co ...
DOI:
10.1007/s12161-020-01957-3

10. Transfer learning strategy for plastic pollution detection in soil: Calibration transfer from high-throughput HSI system to NIR sensor

Author:
Zhao, Shutao; Qiu, Zhengjun; He, Yong
Source:
Chemosphere 2021 v.272 pp. 129908
ISSN:
0045-6535
Subject:
chemometrics,   etc   ; algorithms; calibration; edaphic factors; hyperspectral imagery; models; pollution; rapid methods; soil;     Show all 9 Subjects
Abstract:
... Rapid detection tasks in soil environment are generally implemented by various spectrometers and chemometric models. To reduce costs for model construction, calibration transfer from laboratory spectral instruments to portable devices has recently received extensive attention. In different application cases of model transference, most conventional methods require extra time to tune hyperparameters ...
DOI:
10.1016/j.chemosphere.2021.129908

11. Assessment of elemental profiling combined with chemometrics for authenticating the geographical origins of Pacific white shrimp (Litopenaeus vannamei)

Author:
Han, Cui; Li, Li; Zhang, Gong; Dong, Shuanglin; Tian, Xiangli
Source:
Food control 2021 pp. 108231
ISSN:
0956-7135
Subject:
chemometrics,   etc   ; Litopenaeus vannamei; aquaculture; data collection; discriminant analysis; food safety; models; provenance; shrimp; traceability; China;     Show all 11 Subjects
Abstract:
... Pacific white shrimp (Litopenaeus vannamei) is an important aquaculture species worldwide, and there is a growing concern over misdescribed shrimp products, particularly over their geographical origins. Shrimp samples were collected from 12 locations in northern and southern China to develop traceability methods in identifying their geographic origins. In one of the sampling sites, shrimp were col ...
DOI:
10.1016/j.foodcont.2021.108231

12. A field trials-based authentication study of conventionally and organically grown Chinese yams using light stable isotopes and multi-elemental analysis combined with machine learning algorithms

Author:
Lyu, Chaogeng; Yang, Jian; Wang, Tielin; Kang, Chuanzhi; Wang, Sheng; Wang, Hongyang; Wan, Xiufu; Zhou, Li; Zhang, Wenjin; Huang, Luqi; Guo, Lanping
Source:
Food chemistry 2021 v.343 pp. 128506
ISSN:
0308-8146
Subject:
chemometrics,   etc   ; accuracy; antioxidant activity; correlation; flavonoids; food chemistry; light; models; polyphenols; saponins; secondary metabolites; yams;     Show all 12 Subjects
Abstract:
... In this study, stable isotopes and multi-element signatures combined with chemometrics were used to distinguish conventional and organic Chinese yams based on field trials. Four light stable isotopes δD, δ¹³C, δ¹⁵N, δ¹⁸O, and 20 elements (e.g. Li, Na, Mn) were determined, then evaluated using significance analysis and correlation analysis, and modeling of various chemometrics methods. Consequently ...
DOI:
10.1016/j.foodchem.2020.128506

13. Aliphatic organic acids as promising authenticity markers of bracatinga honeydew honey

Author:
Seraglio, Siluana Katia Tischer; Bergamo, Greici; Brugnerotto, Patricia; Gonzaga, Luciano Valdemiro; Fett, Roseane; Costa, Ana Carolina Oliveira
Source:
Food chemistry 2021 v.343 pp. 128449
ISSN:
0308-8146
Subject:
chemometrics,   etc   ; Mimosa scabrella; capillary electrophoresis; classification; detection; food chemistry; fraud; honeydew honey; models; principal component analysis;     Show all 10 Subjects
Abstract:
... This study aimed to differentiate bracatinga (Mimosa scabrella Bentham) honeydew honey (BHH) from blossom honeys and BHH intentionally adulterated, all of them from three harvests, associating data of aliphatic organic acids (AOA) determined by capillary electrophoresis and chemometric analyses. The profile and concentration of AOA in pure BHH were similar between harvests, but distinct from bloss ...
DOI:
10.1016/j.foodchem.2020.128449

14. Discrimination of honey and syrup-based adulteration by mineral element chemometrics profiling

Author:
Liu, Tao; Ming, Kang; Wang, Wei; Qiao, Ning; Qiu, Shengrong; Yi, Shengxiang; Huang, Xueyong; Luo, Liping
Source:
Food chemistry 2021 v.343 pp. 128455
ISSN:
0308-8146
Subject:
chemometrics,   etc   ; accuracy; adulterated products; barium; food chemistry; honey; minerals; models; statistical analysis; syrups;     Show all 10 Subjects
Abstract:
... Mineral elements are important constituents in honey, which play vital roles in determining the quality and authenticity. The present work aims to systematically estimate the mineral profile of honeys, syrups, and adulterated honeys by syrup directly with chemometrics. Twelve mineral elements with higher contents were determined by ICP-OES in 67 honeys from 6 botanical origins, 17 syrups from 3 ty ...
DOI:
10.1016/j.foodchem.2020.128455

15. Development of a Universal Calibration Model for Quantification of Adulteration in Thai Jasmine Rice Using Near-infrared Spectroscopy

Author:
Wongsaipun, Sakunna; Theanjumpol, Parichat; Kittiwachana, Sila
Source:
Food analytical methods 2021 v.14 no.5 pp. 997-1010
ISSN:
1936-9751
Subject:
chemometrics,   etc   ; adulterants; adulterated products; models; near-infrared spectroscopy; prediction; rice; standard deviation;     Show all 8 Subjects
Abstract:
... In the event the substituent rice variety present in adulterated Thai jasmine rice cannot be identified, the adulterant rice in unknown samples could be inconsistent with that used to establish the calibration model resulting in inaccurate quantitative prediction of the adulteration level. In this research study, near-infrared (NIR) spectroscopy was applied to quantify the adulteration level of Th ...
DOI:
10.1007/s12161-020-01930-0

16. FRUITNIR-GUI: A graphical user interface for correcting external influences in multi-batch near infrared experiments related to fruit quality prediction

Author:
Mishra, Puneet; Roger, Jean Michel; Marini, Federico; Biancolillo, Alessandra; Rutledge, Douglas N.
Source:
Postharvest biology and technology 2021 v.175 pp. 111414
ISSN:
0925-5214
Subject:
chemometrics,   etc   ; fruit quality; fruits; models; near-infrared spectroscopy; prediction; user interface;     Show all 7 Subjects
Abstract:
... Near infrared (NIR) spectroscopy is widely used for non-destructive prediction of fruit traits. Common traits such as dry matter (DM) and soluble solids contents (SSC) can be predicted with reliable accuracy. However, the main problem with NIR spectroscopy is that a model developed on one batch may not perform very well when tested on other batches. Reasons for that are the physical, chemical and ...
DOI:
10.1016/j.postharvbio.2020.111414

17. Determination of l‐theanine in tea water using fluorescence‐visualized paper‐based sensors based on CdTe quantum dots/corn carbon dots and nano‐porphyrin with chemometrics

Author:
Chen, Hengye; Wei, Liuna; Guo, Xiaoming; Hai, Chengying; Xu, Lu; Zhang, Lei; Lan, Wei; Zhou, Chunsong; She, Yuanbin; Fu, Haiyan
Source:
Journal of the science of food and agriculture 2021 v.101 no.6 pp. 2552-2560
ISSN:
0022-5142
Subject:
chemometrics,   etc   ; agriculture; corn; detection limit; discriminant analysis; fluorescence; freshness; models; sweetness; tea; zinc;     Show all 11 Subjects
Abstract:
... BACKGROUND: The quality of tea is influenced by numerous factors, especially l‐theanine, which is one of the important markers used to evaluate the sweetness and freshness of tea. Sensitive, rapid, and accurate detection of l‐theanine is therefore useful to identify the grade and quality of tea. RESULTS: A high‐sensitivity, paper‐based fluorescent sensor combined with chemometrics was established ...
DOI:
10.1002/jsfa.10882

18. Discrimination of menstrual and peripheral blood traces using attenuated total reflection Fourier transform-infrared (ATR FT-IR) spectroscopy and chemometrics for forensic purposes

Author:
Mistek-Morabito, Ewelina; Lednev, Igor K.
Source:
Analytical and bioanalytical chemistry 2021 v.413 no.9 pp. 2513-2522
ISSN:
1618-2642
Subject:
chemometrics,   etc   ; Fourier transform infrared spectroscopy; blood; crime; discriminant analysis; forensic sciences; models;     Show all 7 Subjects
Abstract:
... Body fluid traces can provide highly valuable clues in forensic investigations. In particular, bloodstains are a common occurrence in criminal investigation, and the discrimination of menstrual and peripheral blood is a crucial step for casework involving rape and sexual assault. Most of the current protocols require the detection of characteristic menstrual blood components using sophisticated pr ...
DOI:
10.1007/s00216-021-03206-w

19. Evaluation of Dianhong black tea quality using near‐infrared hyperspectral imaging technology

Author:
Ren, Guangxin; Wang, Yujie; Ning, Jingming; Zhang, Zhengzhu
Source:
Journal of the science of food and agriculture 2021 v.101 no.5 pp. 2135-2142
ISSN:
0022-5142
Subject:
chemometrics,   etc   ; Camellia sinensis; agriculture; beverages; black tea; fraud; models; risk; support vector machines; texture; wavelengths;     Show all 11 Subjects
Abstract:
... BACKGROUND: Tea (Camellia sinensis L) is a highly nutritious beverage with commercial value globally. However, it is at risk of economic fraud. This study aims to develop a powerful evaluation method to distinguish Chinese official Dianhong tea from various other categories, employing hyperspectral imaging (HSI) technology and chemometric algorithms. RESULTS: Two matrix statistical algorithms enco ...
DOI:
10.1002/jsfa.10836

20. A potential method to determine pigment particle size on ancient murals using laser induced breakdown spectroscopy and chemometric analysis

Author:
Yin, Yaopeng; Yu, Zongren; Sun, Duixiong; Su, Maogen; Wang, Zhuo; Shan, Zhongwei; Han, Weiwei; Su, Bomin; Dong, Chenzhong
Source:
Analytical methods 2021 v.13 no.11 pp. 1381-1391
ISSN:
1759-9679
Subject:
chemometrics,   etc   ; atomic absorption spectrometry; models; particle size; signal-to-noise ratio;     Show all 5 Subjects
Abstract:
... Information on pigment sizes in mural samples is a key factor in determining the suitable processes of possible restoration and conservation on ancient murals and is also significant for the investigation of a mural's historic value and analysis of its technical process. Thus, in this paper, the green painted layers composed of different pigment sizes were analyzed by laser-induced breakdown spect ...
DOI:
10.1039/d0ay01546f