高价值沉香油的热重分析(TGA)

IF 2.1 3区 农林科学 Q3 CHEMISTRY, APPLIED
Prashant Kumar, Shreya Tripathi, Prasant Kumar Rout, Sunil Kumar Khare, Satyanarayan Naik
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引用次数: 0

摘要

掺假是精油及其相关行业面临的一个关键问题,尤其是沉香精油等高价值精油。推荐的精油交易分析包括目视检验、嗅觉分析、理化表征和气相色谱-质谱联用(GC-MS)。然而,一些微妙的高锅炉掺假,如植物油和合成聚合物,在这些分析中没有被注意到,导致掺假精油在市场上的渗透。本研究以沉香精油为例,采用热重分析法(TGA)和差热重分析法(DTGA)作为一种快速、方便、精确的精油高沸掺假检测技术。纯样品的TGA模式显示出单阶段挥发(沉香油:110-260°C,蓖麻油:340-500°C,椰子油:330-450°C和聚乙二醇-400:260-390°C),而掺假样品由于沉香油和高沸掺假的存在,在低温区和高温区表现出两阶段挥发。沉香纯油的DTGA只显示一个主要失重点,而掺假样品的DTGA显示两个主要失重点,分别对应于油和掺假。采用TGA和DTGA分别对掺假率(5%、10%、30%和50%)进行了定量,准确度最高。此外,还进行了方法优化研究,以确定分析掺假样品所需的最短时间和精确的准确度。TGA是一种简便、有效的精油质量控制分析方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Quality control analysis of high-value agarwood oil by thermogravimetric analysis (TGA)

Quality control analysis of high-value agarwood oil by thermogravimetric analysis (TGA)

Adulteration is a crucial issue being faced by essential oil and allied industries, especially for high-value essential oil such as agarwood oil. The recommended analysis in trading essential oils involves visual inspection, olfactory analysis, physico-chemical characterization and gas chromatography coupled with mass spectroscopy (GC–MS). However, some subtle high-boiler adulterants like vegetable oils and synthetic polymers go unnoticed via these analyses leading to the penetration of adulterated essential oil in the market. In the current study, the thermogravimetric analysis (TGA) and differential thermogravimetric analysis (DTGA) were utilized and suggested as a rapid, convenient and precise technique for the detection of high-boiler adulterants in essential oils using the most expensive agarwood oil as a case study. The TGA pattern of pure samples reveals single-stage volatilization (agarwood oil: 110–260°C, castor oil: 340–500°C, coconut oil: 330–450°C and polyethylene glycol-400: 260–390°C), whereas the adulterated sample exhibits two-stage volatilization in both lower- and higher-temperature zone owing to the presence of agarwood oil and high-boiler adulterant. The DTGA of pure agarwood oil shows only one point of major weight loss, whereas that of the adulterated sample shows two points of major weight loss corresponding to both oil and adulterant. Different percentages of adulterants (5%, 10%, 30% and 50%) have been quantified using TGA and DTGA with the highest accuracy. Further, the method optimization study was conducted to determine the minimum time required for adulterated sample analysis with precise accuracy. TGA can be proposed as a handy and efficient tool for the quality control analysis of essential oils.

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来源期刊
Flavour and Fragrance Journal
Flavour and Fragrance Journal 工程技术-食品科技
CiteScore
6.00
自引率
3.80%
发文量
40
审稿时长
1 months
期刊介绍: Flavour and Fragrance Journal publishes original research articles, reviews and special reports on all aspects of flavour and fragrance. Its high scientific standards and international character is ensured by a strict refereeing system and an editorial team representing the multidisciplinary expertise of our field of research. Because analysis is the matter of many submissions and supports the data used in many other domains, a special attention is placed on the quality of analytical techniques. All natural or synthetic products eliciting or influencing a sensory stimulus related to gustation or olfaction are eligible for publication in the Journal. Eligible as well are the techniques related to their preparation, characterization and safety. This notably involves analytical and sensory analysis, physical chemistry, modeling, microbiology – antimicrobial properties, biology, chemosensory perception and legislation. The overall aim is to produce a journal of the highest quality which provides a scientific forum for academia as well as for industry on all aspects of flavors, fragrances and related materials, and which is valued by readers and contributors alike.
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