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New Method Based on Zone Melting for Determining Wax Content in Sunflower Oils

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Abstract

In this study, we developed a new method based on zone melting (ZM) for wax determination in sunflower oils. The system point moving, oil composition, and crystallization were analyzed by differential scanning calorimetry, Fourier transform infrared spectroscopy, and microscopy, respectively. The signal of the light sensor versus wax content was confirmed and validated by traditional turbidimetric method. Results showed that ZM could concentrate wax in oil and form wax crystals. These crystals grew at low temperature within 30 min, and the laser light scattered by the crystals was detected through a sensor. The calibration of 0–200 mg/kg was established. The relative standard deviation and percentage recovery of the proposed method were 3.87% and 106.01%, respectively. The proposed method showed good accuracy and precision. Moreover, this novel method is environmentally friendly, making it suitable for use in quality control, analytical laboratories, and assessment of sunflower oils.

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Funding

The authors received financial support from the National Natural Science Foundation of China (NO.:31671819).

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Authors and Affiliations

  1. College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, People’s Republic of China

    Yonglin Li, Yaoyao Dong, Shaoxia Shi, Jia Chen, Shasha Wen & Xiuzhu Yu

  2. Cereal Industrial Technology Academy, Hebei Jinshahe Flour and Noodle Group/Hebei Cereal Food Processing Technology Innovation Center, Xingtai, 054100, Hebei, People’s Republic of China

    Rui Liu & Yanan Xing

Authors
  1. Yonglin Li
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  2. Yaoyao Dong
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  3. Rui Liu
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  4. Shaoxia Shi
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  5. Jia Chen
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  6. Shasha Wen
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  7. Yanan Xing
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  8. Xiuzhu Yu
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Correspondence to Xiuzhu Yu.

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Conflict of Interest

Yonglin Li declares that he has no conflict of interest. Yaoyao Dong declares that she has no conflict of interest. Rui Liu declares that he has no conflict of interest. Shaoxia Shi declares that she has no conflict of interest. Jia Chen declares that he has no conflict of interest. Shasha Wen declares that she has no conflict of interest. Yanan Xing declares that she has no conflict of interest. Xiuzhu Yu declare that he has no conflict of interest.

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Appendices

Appendix 1

Fig. 9
figure 9

Image of ZM device

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Appendix 2

Fig. 10
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Image of Crystal determination device

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Li, Y., Dong, Y., Liu, R. et al. New Method Based on Zone Melting for Determining Wax Content in Sunflower Oils. Food Anal. Methods 14, 503–511 (2021). https://doi.org/10.1007/s12161-020-01881-6

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  • DOI: https://doi.org/10.1007/s12161-020-01881-6

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