The aroma substances analysis of snow pear by gas chromatography-mass spectrometer

Abstract

Headspace solid phase microextraction (HS-SPME) and gas chromatography with mass spectrometry (GC-MS) were used to analyze the aroma substances contained in the peel, pulp, and juice of snow pears, and 61 kinds of aroma substances were identified in the samples. The results showed that esters were detected in all samples, accounting for 60.06%, 12.85%, and 1.42% of the total aroma substances, respectively, in the peel, pulp, and juice. In addition, hexanal, trans-2-hexenal, nonanal, decanal, and dodecanal were also identified, with a total relative content of 7.32% and 75.24% in the pulp and juice samples, respectively. Among these, trans-2-hexenal has a fresh green leaf scent; nonanal has aromas of rose and citrus; decanal has a fresh oily scent, and has a fruity aroma with thin density. Dodecanal has a violet-like, strong, and long-lasting aroma. These aromas make snow pear has a unique and pleasant smell. In addition, the peel of snow pear contains more aroma substances compared to the pulp and juice, with a total of 49 substances detected. Therefore, it is recommended to keep the peels during the processing of pear juice, preserved fruit, and canned food to preserve the unique aroma of the products. Seven and ten aroma substances are detected in pulp sample juice samples, respectively, suggesting that they are suitable for processing juices and canned products.