Detection of cracked shell in intact aromatic young coconut using near infrared spectroscopy and acoustic response methods

Noypitak, Sirinad; Imsabai, Wachiraya; Noknoi, W.; Karoojee, Supasuta; Terdwongworakul, Anupun; Kobori, Hikaru

doi:10.1007/s11694-019-00119-2

Cited by 10 publications

(6 citation statements)

References 28 publications

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“…The quality evaluation of non-edible coconut products such as coconut shells is equally important as they are prone to cracking due to climate variations [ 51 ]. Identifying cracks in shells is difficult as they are not observed externally.…”

Section: Resultsmentioning

confidence: 99%

“…Identifying cracks in shells is difficult as they are not observed externally. Traditionally, farmers have adopted the buoyancy method to evaluate cracked shells [ 51 ]. However, this method is tedious, as evaluating every coconut fruit in a bunch is a time-consuming process.…”

Section: Resultsmentioning

confidence: 99%

“…This method has been used previously to detect internal defects in citrus fruits, moody cores in apples, and internal bruising in blueberries [ 84 , 85 , 86 ]. Noypitak, Imsabai, Noknoi, Karoojee, Terdwongworakul and Kobori [ 51 ] studied and evaluated NIR application and acoustic response for detecting cracked shells in Thai young coconuts. The NIR method demonstrated outstanding potential for identifying cracked shells in coconuts in bunches.…”

Section: Resultsmentioning

confidence: 99%

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Contemporary Developments and Emerging Trends in the Application of Spectroscopy Techniques: A Particular Reference to Coconut (Cocos nucifera L.)

et al. 2022

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The number of food frauds in coconut-based products is increasing due to higher consumer demands for these products. Rising health consciousness, public awareness and increased concerns about food safety and quality have made authorities and various other certifying agencies focus more on the authentication of coconut products. As the conventional techniques for determining the quality attributes of coconut are destructive and time-consuming, non-destructive testing methods which are accurate, rapid, and easy to perform with no detrimental sampling methods are currently gaining importance. Spectroscopic methods such as nuclear magnetic resonance (NMR), infrared (IR)spectroscopy, mid-infrared (MIR)spectroscopy, near-infrared (NIR) spectroscopy, ultraviolet-visible (UV-VIS) spectroscopy, fluorescence spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and Raman spectroscopy (RS) are gaining in importance for determining the oxidative stability of coconut oil, the adulteration of oils, and the detection of harmful additives, pathogens, and toxins in coconut products and are also employed in deducing the interactions in food constituents, and microbial contaminations. The objective of this review is to provide a comprehensive analysis on the various spectroscopic techniques along with different chemometric approaches for the successful authentication and quality determination of coconut products. The manuscript was prepared by analyzing and compiling the articles that were collected from various databases such as PubMed, Google Scholar, Scopus and ScienceDirect. The spectroscopic techniques in combination with chemometrics were shown to be successful in the authentication of coconut products. RS and NMR spectroscopy techniques proved their utility and accuracy in assessing the changes in coconut oil’s chemical and viscosity profile. FTIR spectroscopy was successfully utilized to analyze the oxidation levels and determine the authenticity of coconut oils. An FT-NIR-based analysis of various coconut samples confirmed the acceptable levels of accuracy in prediction. These non-destructive methods of spectroscopy offer a broad spectrum of applications in food processing industries to detect adulterants. Moreover, the combined chemometrics and spectroscopy detection method is a versatile and accurate measurement for adulterant identification.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Contemporary Developments and Emerging Trends in the Application of Spectroscopy Techniques: A Particular Reference to Coconut (Cocos nucifera L.)

et al. 2022

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“…In terms of collecting input for spectral processing, various configurations have been studied, viz. taking measurements in 90-degree rotations ( 10 ) or 120-degree rotations ( 13 ), contacting the epidermis ( 8 ), using 360-degree measurements ( 9 ), and taking multiple measurements at different points and averaging the values ( 75 ). In a comparison of apples held at different orientations for measurement, orienting apples along the equatorial region showed the highest potential for defect detection ( 9 ).…”

Section: Applications Of Spectroscopic Techniquesmentioning

confidence: 99%

“…(This diagram shows the simplest representation possible, and does not account for a more practical NIRS system). The light source emits photons in the infrared region, which come into contact with the sample, and their further interactions create vibrations or stretching ( 13 ) in the molecules in the interior of the sample. These vibrations create a spectrum dependent on the properties of the molecule and their corresponding chemical bonds.…”

Section: Introductionmentioning

confidence: 99%

Recent advancements in NIR spectroscopy for assessing the quality and safety of horticultural products: A comprehensive review

et al. 2022

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The qualitative and quantitative evaluation of agricultural products has often been carried out using traditional, i.e., destructive, techniques. Due to their inherent disadvantages, non-destructive methods that use near-infrared spectroscopy (NIRS) coupled with chemometrics could be useful for evaluating various agricultural products. Advancements in computational power, machine learning, regression models, artificial neural networks (ANN), and other predictive tools have made their way into NIRS, improving its potential to be a feasible alternative to destructive measurements. Moreover, the incorporation of suitable preprocessing techniques and wavelength selection methods has arguably proven its practical feasibility. This review focuses on the various computation methods used for processing the spectral data collected and discusses the potential applications of NIRS for evaluating the quality and safety of agricultural products. The challenges associated with this technology are also discussed, as well as potential future perspectives. We conclude that NIRS is a potentially useful tool for the rapid assessment of the quality and safety of agricultural products.

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Non-Destructive Testing to Determine Quality and Maturity of Coconut and Coconut Products

Nair U. K.,

Varghese,

Sinija

2024

Preservation and Authentication of Coconut Products

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Detection of cracked shell in intact aromatic young coconut using near infrared spectroscopy and acoustic response methods

Cited by 10 publications

References 28 publications

Contemporary Developments and Emerging Trends in the Application of Spectroscopy Techniques: A Particular Reference to Coconut (Cocos nucifera L.)

Contemporary Developments and Emerging Trends in the Application of Spectroscopy Techniques: A Particular Reference to Coconut (Cocos nucifera L.)

Recent advancements in NIR spectroscopy for assessing the quality and safety of horticultural products: A comprehensive review

Non-Destructive Testing to Determine Quality and Maturity of Coconut and Coconut Products

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