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综述了水和食品中有机磷农药残留检测中样品的前处理方法 (包括液液萃取、固相萃取、液相微萃取、固相微萃取、拌棒吸附萃取、磁固相萃取、QuEChERS等)和测定方法(包括气相色谱法、气相色谱-质谱法、液相色谱法、液相色谱-质谱法等)的研究进展(引用文献58篇)。 相似文献
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《理化检验(化学分册)》2017,(2)
综述了食品及食品包装材料中光引发剂分析方法的研究进展,包括样品的前处理方法(如固相萃取、固相微萃取、基质分散固相萃取、加速溶剂萃取、分散液液微萃取、凝胶渗透色谱)和分析方法(如气相色谱-质谱法、气相色谱-串联质谱法、液相色谱法、液相色谱-串联质谱法、超高效合相色谱法),并对其发展趋势作了展望。 相似文献
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环境样品中阿特拉津的检测方法研究进展 总被引:1,自引:0,他引:1
《理化检验(化学分册)》2017,(1)
综述了2011~2015年内环境样品中阿特拉津残留量分析方法的研究进展,包括液液萃取、固相萃取、固相微萃取、液相微萃取、超声提取、微波辅助萃取等分离方法和气相色谱-质谱、液相色谱-质谱、生物技术等检测方法,以及上述分析方法的应用情况,并对阿特拉津的检测方法的前景进行了展望(引用文献46篇)。 相似文献
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综述了近10年来生物样品中镇静类药物的检测方法(包括高效液相色谱法、气相色谱-质谱法、液相色谱-串联质谱法和液相色谱-高分辨质谱法等)和样品预处理方法(包括液液萃取法、固相萃取法、分散固相萃取法和柱切换法等)的研究进展,并对其前景作了简要展望(引用文献45篇)。 相似文献
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合成麝香被广泛应用于个人护理产品和生活用品中,在环境中的污染程度呈逐年上升的趋势,准确测定环境中合成麝香的含量具有重要意义。综述了水体中合成麝香的前处理方法(包括固相萃取法、固相微萃取法、液液萃取法、液液微萃取法、索氏提取法、超声辅助提取法、加速溶剂萃取法和QuEChERS等)和仪器分析方法(包括气相色谱-质谱法、气相色谱-串联质谱法、高效液相色谱法、液相色谱-串联质谱法和新型荧光光谱法等),并对相关研究领域的发展趋势进行了展望(引用文献52篇)。 相似文献
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《理化检验(化学分册)》2016,(2)
综述了环境和生物样品中有机氯农药残留检测中样品的前处理方法(包括溶剂提取、溶剂提取和层析柱分离法、微波萃取、凝胶渗透色谱净化法、固相萃取法等)和测定方法(包括气相色谱法、气相色谱-质谱法等)的研究进展。 相似文献
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固相微萃取和气质联用分析测定土壤中13种挥发性芳香烃 总被引:2,自引:0,他引:2
建立了固相微萃取(SPME)-气相色谱质谱法(GC-MS)测定土壤中13种挥发性芳香烃的方法.用SPME萃取土壤中的挥发性芳香烃,利用安捷伦5977A气相色谱-质谱进行分离检测,选用土壤基质修改液提高了目标化合物的回收率.13种芳香烃组分在5.0、10、20、40、50μg/kg土壤中质量浓度范围内呈线性关系,相关系数r2大于0.995,方法检测限小于1.0μg/kg,完全满足检测要求. 相似文献
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Xuan Chen Yanqin Zhang Zhuoyi Li Xiaohong Bai Shuang Hu Runqin Wang Li Yang Yifang Zhang Dan Tie 《Journal of separation science》2020,43(2):462-469
Two proposed syringe membrane filter solid phase microextraction and syringe membrane filter liquid/solid phase microextraction, coupled separately with high performance liquid chromatography, were developed for simultaneous enrichment and determination of the trace level of flavonoids in traditional Chinese medicine. In syringe membrane filter solid phase microextraction, the membrane of syringe membrane filter was served as a solid adsorption film to adsorb target analytes. And in syringe membrane filter liquid/solid phase microextraction, the membrane of syringe membrane filter was used as not only an adsorption phase, but also as a holder of extraction solvent to realize liquid‐solid synergistic extraction. The simple operation, rapid extraction, and little or no organic solvent consumption make the two approaches very interesting. To evaluate the two proposed approaches, the crucial parameters affecting the enrichment factors of target analytes were investigated and optimized, and the two microextractions were intercompared. Moreover, their microextraction mechanisms were analyzed and described. Under the optimized conditions, both the new approaches achieved good linearities, accuracies, precisions, and low limits of detection, and the two methods were successfully applied for concentration of the flavonoids in traditional Chinese medicines. 相似文献
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Juliana Soares da Silva Burato Deyber Arley Vargas Medina Ana Lúcia de Toffoli Edvaldo Vasconcelos Soares Maciel Fernando Mauro Lanas 《Journal of separation science》2020,43(1):202-225
Advances in the area of sample preparation are significant and have been growing significantly in recent years. This initial step of the analysis is essential and must be carried out properly, consisting of a complicated procedure with multiple stages. Consequently, it corresponds to a potential source of errors and will determine, at the end of the process, either a satisfactory result or a fail. One of the advances in this field includes the miniaturization of extraction techniques based on the conventional sample preparation procedures such as liquid‐liquid extraction and solid‐phase extraction. These modern techniques have gained prominence in the face of traditional methods since they minimize the consumption of organic solvents and the sample volume. As another feature, it is possible to reuse the sorbents, and its coupling to chromatographic systems might be automated. The review will emphasize the main techniques based on liquid‐phase microextraction, as well as those based upon the use of sorbents. The first group includes currently popular techniques such as single drop microextraction, hollow fiber liquid‐phase microextraction, and dispersive liquid‐liquid microextraction. In the second group, solid‐phase microextraction techniques such as in‐tube solid‐phase microextraction, stir bar sorptive extraction, dispersive solid‐phase extraction, dispersive micro solid‐phase microextraction, and microextraction by packed sorbent are highlighted. These approaches, in common, aim the determination of analytes at low concentrations in complex matrices. This article describes some characteristics, recent advances, and trends on miniaturized sample preparation techniques, as well as their current applications in food, environmental, and bioanalysis fields. 相似文献
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Ultrapreconcentration and determination of organophosphorus pesticides in water by solid‐phase extraction combined with dispersive liquid–liquid microextraction and high‐performance liquid chromatography
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Junhua Chen Guangming Zhou Yongli Deng Hongmei Cheng Jie Shen Yi Gao Guilong Peng 《Journal of separation science》2016,39(2):272-278
Solid‐phase extraction coupled with dispersive liquid–liquid microextraction was developed as an ultra‐preconcentration method for the determination of four organophosphorus pesticides (isocarbophos, parathion‐methyl, triazophos and fenitrothion) in water samples. The analytes considered in this study were rapidly extracted and concentrated from large volumes of aqueous solutions (100 mL) by solid‐phase extraction coupled with dispersive liquid–liquid microextraction and then analyzed using high performance liquid chromatography. Experimental variables including type and volume of elution solvent, volume and flow rate of sample solution, salt concentration, type and volume of extraction solvent and sample solution pH were investigated for the solid‐phase extraction coupled with dispersive liquid–liquid microextraction with these analytes, and the best results were obtained using methanol as eluent and ethylene chloride as extraction solvent. Under the optimal conditions, an exhaustive extraction for four analytes (recoveries >86.9%) and high enrichment factors were attained. The limits of detection were between 0.021 and 0.15 μg/L. The relative standard deviations for 0.5 μg/L of the pesticides in water were in the range of 1.9–6.8% (n = 5). The proposed strategy offered the advantages of simple operation, high enrichment factor and sensitivity and was successfully applied to the determination of four organophosphorus pesticides in water samples. 相似文献
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Juan Antonio Ocaña-González Rut Fernández-Torres Miguel Ángel Bello-López María Ramos-Payán 《Analytica chimica acta》2016
In recent years, the interest in new extraction methods with lower sample volume requirements, simpler equipment and handling, and lower reagent consumption, has led to the development of a series of microextraction methods based on extraction phases in the microliter order. Nowadays, many references can be found for several of these methods, which imply a wide range of applications referred to both the analyte and the sample nature. In this paper, recent developments in both well-established microextraction techniques (solid phase microextraction, hollow-fiber liquid phase microextraction, dispersive liquid–liquid microextraction, etc.) and recently appeared microextraction procedures (nanoextraction systems, microchip devices, etc.) for the clinical analysis of biological samples will be reviewed and discussed. 相似文献
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I. Jiménez-Díaz F. Vela-Soria R. Rodríguez-Gómez A. Zafra-Gómez O. Ballesteros A. Navalón 《Analytica chimica acta》2015
In the present work, a review of the analytical methods developed in the last 15 years for the determination of endocrine disrupting chemicals (EDCs) in human samples related with children, including placenta, cord blood, amniotic fluid, maternal blood, maternal urine and breast milk, is proposed. Children are highly vulnerable to toxic chemicals in the environment. Among these environmental contaminants to which children are at risk of exposure are EDCs —substances able to alter the normal hormone function of wildlife and humans—. The work focuses mainly on sample preparation and instrumental techniques used for the detection and quantification of the analytes. The sample preparation techniques include, not only liquid–liquid extraction (LLE) and solid-phase extraction (SPE), but also modern microextraction techniques such as extraction with molecular imprinted polymers (MIPs), stir-bar sorptive extraction (SBSE), hollow-fiber liquid-phase microextraction (HF-LPME), dispersive liquid–liquid microextraction (DLLME), matrix solid phase dispersion (MSPD) or ultrasound-assisted extraction (UAE), which are becoming alternatives in the analysis of human samples. Most studies focus on minimizing the number of steps and using the lowest solvent amounts in the sample treatment. The usual instrumental techniques employed include liquid chromatography (LC), gas chromatography (GC) mainly coupled to tandem mass spectrometry. Multiresidue methods are being developed for the determination of several families of EDCs with one extraction step and limited sample preparation. 相似文献
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角鲨烯是一种存在于动物、植物、微生物体内的小分子功能活性脂质,由于具有抗氧化、防癌抗癌、抗辐射、携氧、皮肤保湿和抑制微生物生长等多种生物活性功能,被广泛应用于功能食品、医药产品和化妆品的开发。因此,不同食品中角鲨烯含量的分析技术一直是国内外学者研究的热点与重点。该文综述了不同食品中角鲨烯的样品前处理方法,包括超临界二氧化碳萃取法、固相萃取法、固相微萃取法、皂化法、有机溶剂提取法和分步结晶法等以及气相色谱法、液相色谱法和气相色谱-质谱联用法等检测方法在角鲨烯分析中的应用,并对其发展趋势进行了展望,为食品中角鲨烯的分析提供参考与借鉴。 相似文献
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Sample preparation is a critical step in forensic analytical toxicology. Different extraction techniques are employed with the goals of removing interferences from the biological samples, such as blood, tissues and hair, reducing matrix effects and concentrating the target analytes, among others. With the objective of developing faster and more ecological procedures, microextraction techniques have been expanding their applications in the recent years. This article reviews various microextraction methods, which include solid‐based microextraction, such as solid‐phase microextraction, microextraction by packed sorbent and stir‐bar sorptive extraction, and liquid‐based microextraction, such as single drop/hollow fiber‐based liquid‐phase microextraction and dispersive liquid–liquid microextraction, as well as their applications to forensic toxicology analysis. The development trend in future microextraction sample preparation is discussed. 相似文献
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Bin Huang Dongdong Yan Wensheng Fang Xianli Wang Jie Liu Daqi Zhang Qiuxia Wang Canbin Ouyang Qingli Han Xi Jin Aocheng Cao 《Journal of separation science》2020,43(8):1499-1513
The quantity of soil fumigants has increased globally that has focused attention on their environmental behavior. However, simultaneous analysis of traces of fumigant residues is often unreported because analysis methods are not readily available to measure them at low concentrations. In this study, typical solvent extraction methods were compared with headspace solid‐phase microextraction methods. Both methods can be used for simultaneously measuring the concentrations of five commonly used soil fumigants in soil or water. The solvent extraction method showed acceptable recovery (76–103%) and intraday relative standard deviations (0.8–11%) for the five soil fumigants. The headspace solid‐phase microextraction method also showed acceptable recovery (72–104%) and precision rates (1.3–17%) for the five soil fumigants. The solvent extraction method was more precise and more suitable for analyzing relatively high fumigant residue levels (0.05–5 μg/g) contained in multiple soil samples. The headspace solid‐phase microextraction method, however, had a much lower limits of detection (0.09–2.52 μg/kg or μg/L) than the solvent extraction method (5.8–29.2 μg/kg), making headspace solid‐phase microextraction most suitable for trace analysis of these fumigants. The results confirmed that the headspace solid‐phase microextraction method was more convenient and sensitive for the determination of fumigants to real soil samples. 相似文献