Microwave assisted extraction for trace element analysis of plant materials by ICP-AES

2000 ◽  
Vol 368 (6) ◽  
pp. 633-637 ◽  
Author(s):  
J. Borkowska-Burnecka
Keyword(s):  
Trace Element ◽  
Trace Element Analysis ◽  
Microwave Assisted Extraction ◽  
Element Analysis ◽  
Plant Materials ◽  
Microwave Assisted ◽  
Assisted Extraction

scholarly journals Evaluation of various mineralization methods and measurement techniques for trace element analysis of plant materials

Analusis ◽  
1998 ◽  
Vol 26 (3) ◽  
pp. 116-120 ◽  
Author(s):  
E. Curdová ◽  
J. Száková ◽  
D. Miholová ◽  
O. Mestek ◽  
M. Suchánek
Keyword(s):  
Trace Element ◽  
Measurement Techniques ◽  
Trace Element Analysis ◽  
Element Analysis ◽  
Plant Materials

scholarly journals Optimization of Commercial Microwave Assisted-Extraction Conditions for Recovery of Phenolics from Lemon-Scented Tee Tree (Leptospermum petersonii) and Comparison with Other Extraction Techniques

Foods ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 50
Author(s):  
Md Saifullah ◽  
Taiwo Olusesan Akanbi ◽  
Rebecca McCullum ◽  
Quan Van Vuong
Keyword(s):  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Plant Materials ◽  
Soaking Time ◽  
Tea Tree ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Irradiation Power ◽  
The Impact ◽  
Radiation Time

The lemon-scented tea tree (LSTT) is an Australian native herb and is a rich source of essential oil and phenolics. The ETHOS X extraction system is known as a commercial microwave-assisted extraction (MAE) system for extracting bioactive compounds from plant materials. This study investigated the influence of soaking time, radiation time, microwave power, and sample to solvent ratio on the extraction efficiency of polyphenols and antioxidant properties from lemon-scented tea tree leaves and optimized the extraction conditions using response surface methodology (RSM). The effectiveness of ETHOS X was further compared with ultrasound-assisted extraction (UAE) and shaking water bath (SWB) techniques. The results revealed that soaking time did not significantly affect the recovery of phenolics from the leaves (p > 0.05). Thus, soaking is not required for the ETHOS X extraction of polyphenols from LSTT leaves. RSM was successfully applied to explore the impact of ETHOS X extraction conditions and optimize the extraction conditions. Radiation time significantly affects the recovery yield of phenolics (p < 0.05) positively, whereas irradiation power and sample to solvent ratio adversely influenced the extraction yields of phenolics. The optimal ETHOS X extraction conditions were: radiation time of 60 min, irradiation power of 600 W, and sample to solvent ratio of 2 g/100 mL. Under these conditions, 119.21 ± 7.09 mg of phenolic, 85.31 ± 4.55 mg of flavonoids, and 137.51 ± 12.52 mg of proanthocyanidins can be extracted from a gram of dried LSTT leaves. In comparison with UAE and SWB, ETHOS X is not more effective for the extraction of phenolics than UAE and SWB. However, this technique can save half of the solvent volume compared to UAE and SWB techniques.

EFFECT OF DIFFERENT OPERATING PARAMETERS ON EXTRACTION OF ACTIVE COMPOUNDS FROM PITAYA PEEL BY MICROWAVE ASSISTED EXTRACTION (MAE)

2018 ◽  
Vol 80 (2) ◽  
Author(s):  
Muhd Azlan Nazeri ◽  
Norashikin Mat Zain
Keyword(s):  
Energy Demand ◽  
Total Phenolic ◽  
Operating Parameters ◽  
Distilled Water ◽  
Microwave Assisted Extraction ◽  
Plant Materials ◽  
Active Compounds ◽  
Microwave Assisted ◽  
Liquid Extract ◽  
Assisted Extraction

Microwave-assisted extraction (MAE) has been recognised as a powerful potential alternative for the extraction of active compounds from plant materials compared to other advanced methods such as ultrasound-assisted extraction (UAE), pressurised liquid extraction (PLE), supercritical fluid extraction (SFE), and Soxhlet. The advantages of MAE processing technique are reduced processing time, higher yield, lower usage of solvent, and smaller energy demand. Nevertheless, most researchers used organic solvents which have toxic effect on the environment. Therefore, in this study, distilled water was used as a natural solvent in the sample preparation. Pitaya peel is a form of potential fruit waste, especially in the food industry. Notably, its liquid extract can be applied as natural colouring and it contains beneficial active compounds that have commercial value. Wastage during the processing of food is inevitable and disposal can be a major problem for the industry and the society. Negative impacts such as pollution to the environment, hazards to human health, and loss of income to the waste generator may occur. Thus, extraction can be an effective solution for minimising waste produced by the food processing industry. Food waste often contain several usable substances of high value including some of that are beneficial for health such as mineral contents and phenolic compounds. The aim of this research was to find the optimal operating parameters for extraction of total phenolic content (TPC) from pitaya peel using MAE method. These parameters were the (1) weight of the sample, (2) temperature, (3) power, and (4) extraction time. In this research, the results showed that the best condition for the parameters of MAE were at the power of 400 W, temperature of 45 °C, and 20 min contact time when extracting 1.2 g pitaya peel in 50 mL distilled water. These figures were validated through statistical analysis using SPSS with Bonferroni post hoc tests. The TPC presented in the liquid extract was measured in GAE/g. In addition, the Inhibitory Concentration (IC50) of the liquid extract was determined by applying the best condition for the parameters of MAE and DPPH reagent as the synthetic free radical. The IC50 value obtained in this research was 0.52 mg/mL.

scholarly journals Microwave-Assisted Extraction of Bioactive Compounds (Review)

2021 ◽  
Author(s):  
Abdurahman Hamid Nour ◽  
Alara Ruth Oluwaseun ◽  
Azhari Hamid Nour ◽  
Manal Suliman Omer ◽  
Noormazlinah Ahmed
Keyword(s):  
Bioactive Compounds ◽  
Microwave Assisted Extraction ◽  
Traditional Methods ◽  
Plant Materials ◽  
Factors Affecting ◽  
Microwave Assisted ◽  
Plant Samples ◽  
Assisted Extraction

In recent times, bioactive compounds from plant samples are extracted using a microwave extractor. This is because traditional methods of extraction are need of higher volume of solvents, degrade thermal-sensitive bioactive compounds, and consume much time of extraction. Hence, this chapter unveils the importance of the microwave-assisted extraction (MAE) technique in the recovery of bioactive compounds from plants. The involving extraction steps need to recover higher yields, faster, consumption of lesser extracting solvents, and ensure stable heat-sensitive bioactive compounds. The factors affecting MAE in the recovery of bioactive compounds from plant materials are as well discussed. Additionally, some of the previously reported bioactive compounds from plant samples using MAE are highlighted.

Enhanced trace element analysis of plant materials after accelerated pulsed UV digestion

2008 ◽  
Vol 277 (2) ◽  
pp. 441-449 ◽  
Author(s):  
A. Mireles ◽  
C. Solís ◽  
M. C. Lagunas-Solar ◽  
C. Piña ◽  
R. G. Flocchini ◽  
...  
Keyword(s):  
Trace Element ◽  
Trace Element Analysis ◽  
Element Analysis ◽  
Plant Materials
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