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Journal of AOAC International

Jiao-Jiao Fan, Chun-Hong Li, Guang Hu, Cheng-Ning Tan, Feng-Qing Yang, Hua Chen, Zhi-Ning Xia
Background: Aloe barbadensis Miller 1768, A. vera L. var . chinensis (Haw.) Berger 1908, A. ferox Miller 1768, and A. arborescens Miller 1768 are the most widely cultivated species of Aloe and are used in Asia along with 400 other Aloe species worldwide because of their potent and potential bioactivity. Objective: The objective was to analyze and compare the soluble proteins of four commonly used medicinal Aloe species. Methods: Aloe protein samples were obtained by TCA/acetone-saturated phenol-methanol/ammonium acetate combined extraction (phenol extraction), and then were analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and two-dimensional gel electrophoresis...
November 2, 2018: Journal of AOAC International
Lu Han, Ruizhou Wang, Xia Zhang, Xin Yu, Li Zhou, Tao Song, Xinxin Deng, Yuying Zhang, Liming Zhang, Changcai Bai
Coptidis rhizoma (CR), also known as "Huanglian" in Chinese, is a traditional Chinese medicine commonly used in China, and it is an important species used in medicinal and food applications. It has been processed using a variety of methods, and the processed products have been widely used in clinical practice for thousands of years. However, few reports have focused on the systematic review of its processed products and quality control. In this study, a literature search on processing and quality control of CR was performed by using several literature resources including the Flora of China official website; various scientific databases such as PubMed, Google Scholar, the Web of Science, Science Direct, and China Knowledge Resource Integrated; and other web sources such as books and PhD and MS dissertations...
November 2, 2018: Journal of AOAC International
Wan-Xin Zhang, In-Cheng Chao, De-Jun Hu, Farid Shakerian, Liya Ge, Xiao Liang, Ying Wang, Jing Zhao, Shao-Ping Li
Background: Alpinia officinarum Hance (ginger family) is an important Chinese medicine, especially in Southern China. Objective: A simple and effective high-performance thin-layer chromatography coupled with 2, 2-diphenyl-1-picrylhydrazyl bioautography (HPTLC-DPPH) and electrospray ionization quadrupole time-of-flight tandem mass spectrometry (ESI-Q-TOF-MS/MS) method was developed for the bioactivity-based quality control of A. officinarum. Methods: The HPTLC-DPPH and ESI-Q-TOF-MS/MS were applied for the analysis of different parts of A...
November 2, 2018: Journal of AOAC International
Chaozhan Lin, Fangle Liu, Runjing Zhang, Meiting Liu, Chenchen Zhu, Jing Zhao, Shaoping Li
Background: The aerial parts of Isodon lophanthoides (Buch. Ham. ex D. Don) Hara (IL) has been officially recorded as Isodonis lophanthoidis herba by many provincial quality control standards for Chinese herbal medicines in China. Recently, it has been found that one of its varieties, I. lophanthoides var. gerardianus (Benth.) Hara (ILVG) was pretended to be I. lophanthoidis herba in herbal material markets or cultivated bases. Because of the similarity on appearance, these two close-related species were difficult to be identified by morphological characters, especially when they are dried and sliced...
November 2, 2018: Journal of AOAC International
Qing Li, Luyi Jiang, Huan Zhang, Mengmeng Wei, Chu Chu, Jizhong Yan
Background: Aflatoxins (AFs) have attracted increasing amounts of attention in recent years for their high toxicity. Previously, AF-polluted Chinese Patent Medicines (CPMs) were ignored, but their quality, safety, and efficacy might be influenced by the toxic compounds. Objective: The objective is to develop a simple, low-cost, and efficient method for quantitative analysis of aflatoxins B1 (AFB1 ) and B₂ (AFB₂) in CPMs to ensure their safe use. Methods: A simple, modified, magnetic nanoparticle-based solid-phase extraction (SPE) combined with HPLC-fluorescence detection for the determination of trace amounts of AFB1 and AFB₂ was established...
November 2, 2018: Journal of AOAC International
Jing Zhao, Shuangcheng Ma, Shaoping Li
No abstract text is available yet for this article.
October 31, 2018: Journal of AOAC International
Greg Jaudzems, Fengxia Zhang, Wu Bolong, Lei Bao, Jing Xiao
Background: In September 2015, both AOAC Official Methods 2015.07 and 2015.08 single-laboratory validations (SLVs) were reviewed against Standard Method Performance Requirements® (SMPR) 2014.015 by the AOAC Stakeholder Panel for Infant Formula and Adult Nutritional (SPIFAN) Expert Review Panel (ERP). Looking at the similarity and uniqueness of the two methods, the authors agreed, as advised by the ERP, to work together to merge the two methods into one. This combined method was assigned Method 2016.03. Objective: In order to determine the repeatability and reproducibility of the AOAC First Action 2016...
October 31, 2018: Journal of AOAC International
Jianbo Qu, Tideng Zhang, Jiaxing Liu, Yuanyuan Su, Hainan Wang
Background: The quality control of traditional Chinese medicine (TCM) has been essential for the development of TCM industry. In recent years, with the acceleration of TCM modernization, research on the quality control of TCM has reached a higher level. Objective: This article suggested a comprehensive approach to the quality control of TCM and proposed specific requirements for the quality control of newly registered TCM in various phases of development. Method: The views in this article are mainly derived from the laws and regulations of China and the authors' experiences...
October 31, 2018: Journal of AOAC International
Jieli Mo, Hainan Wang, Bo Yuan
Learning from the ideas of the International Conference on Harmonization Q6B guideline in the quality control of biological and biotechnological products, it is proposed to improve the quality standard system and quality control of Chinese herbal slices, from reforming the mechanism of setting standards, improving the principles of quality standards, and clarifying the basis for setting the standards. The quality standard and quality control of Chinese herbal slices need to be improved through practical strategies with reasonable technology...
October 31, 2018: Journal of AOAC International
Ursula Vincent, Zigmas Ezerskis, Christoph von Holst
Background: Diclazuril is a coccidiostat currently authorized as feed additive in the European Union (EU), with a legal limit set at 1 mg/kg. For official control, an official EU method based on reversed-phase HPLC coupled with UV detection at 280 nm needs to be applied. Recently, the EU Reference Laboratory for feed additives was informed that the recovery rate for diclazuril was very low when implementing this method and performed experiments demonstrating that the indicated sorbent mass of the solid-phase extraction (SPE) was too low...
October 31, 2018: Journal of AOAC International
Issam Barra, Mohammed Alaoui Mansouri, Mohammed Bousrabat, Yahia Cherrah, Abdelaziz Bouklouze, Mourad Kharbach
In this work, transform-infrared spectroscopy (FTIR) was associated with chemometric tools, especially principal component analysis (PCA) and partial least squares regression (PLSR), to discriminate and quantify gasoline adulteration with diesel. The method is composed of a total of 100 mixtures were prepared, and then FTIR fingerprints were recorded for all samples. PCA was used to verify that mixtures can be distinguished from pure products and to check that there are no outliers. As a result of using just PC1 and PC2, more than 98% of the general variability was explained...
October 23, 2018: Journal of AOAC International
Quynh-Nhi Le, Brooke Roman, Dana Driksna, Lindsey Gilbert, Kaylee Gonzales, Frank Klein, Robert Donofrio
Background: The Reveal Q+ MAX for Aflatoxin is a lateral flow immunochromatographic test intended for quantitative analysis within 6 min after aqueous extraction. Objective: Work was conducted to validate the performance of the Reveal Q+ MAX for Aflatoxin method in selected corn and nut matrixes. Methods: This method was validated under the requirements of the AOAC Research Institute Performance Tested Method SM program. Five matrixes, including corn naturally contaminated with aflatoxin at 0, 5.2, 21.0, 51...
October 23, 2018: Journal of AOAC International
Danni Yang, Yi Yang, Yongxin Li, Shuo Yin, Yaling Chen, Jiamin Wang, Jiangyu Xiao, Chengjun Sun
Background: Consistent toxicological evidence indicate that phthalates can cause adverse effects on human health. The concern over phthalate pollution and exposure has been emphasized in recent years. Therefore, the sensitive, reliable, and rapid detection of phthalates in water is of great importance. Objective: In this study, dispersive liquid-liquid microextraction based on solidification of floating organic droplet (DLLME-SFO) combined with HPLC-UV detection was established and applied in the preconcentration and detection of 15 phthalates in drinking and river water samples...
October 19, 2018: Journal of AOAC International
Dongxia Ren, Min Fan, Chengjun Sun, Chen Zhou, Yongxin Li
Background: Gout arthritis is a common inflammatory arthritis and it poses a major threat to human health. Objective: A method of capillary electrophoresis with laser-induced fluorescence detection (CE-LIF) for the detection of HSP60 gene polymorphism has been developed and applied to the exploration of correlation between gouty arthritis and HSP60 gene polymorphism. Methods: The genomic deoxyribonucleic acid from 59 patients with gouty arthritis and 64 control subjects was extracted and the conservative fragment of HSP60 was amplified...
October 19, 2018: Journal of AOAC International
Tomasz Tuzimski, Dominika Pieniążek, Grzegorz Buszewicz, Grzegorz Teresiński
Different extraction and clean-up protocols, based on either the dispersive solid-phase extraction (d-SPE) and the quick, easy, cheap, effective, rugged, and safe (QuEChERS) approach, were optimized and compared for the determination of selected bisphenols such as bisphenol A (BPA) and bisphenol S (BPS) in breast milk samples. QuEChERS-based sample preparation procedure was optimized by evaluation of different clean-up sorbents including zirconium-based sorbents (Z-Sep and Z-Sep Plus) and primary secondary amine...
October 17, 2018: Journal of AOAC International
Rada D Ðurović-Pejčev, Vojislava P Bursić, Tijana M Zeremski
Background: The increased use of pesticides leads to permanent pollution of soil, and there is a need for continuous monitoring of these agrochemicals in soil. Objective: Three methods for the simultaneous determination of 12 pesticides belonging to eight chemical groups in soil samples were tested and compared based on analytical parameters. Methods: The quick, easy, cheap, effective, rugged, and safe (QuEChERS); traditional solid-liquid extraction (SLE); and Soxhlet extraction were used for soil sample preparation, while detection and quantification of pesticides were performed using gas chromatography-mass spectrometry (GC-MS)...
October 15, 2018: Journal of AOAC International
Nicaellen Roberta da Silva Souza, Sandro Navickiene
Background : A simple and effective extraction method based on ultrasonic solvent extraction and liquid-liquid microextraction (as the cleaning step) was developed to determine seven pesticide residues in roasted coffee ( Coffea arabica ) using ultra-performance LC-tandem MS. Objective : Different parameters of the method were evaluated, including solvent type and amount and sonication time. The best results were obtained using 1.0 g roasted coffee and acetonitrile (5 mL) as the extraction solvent with sonication for 15 min...
October 10, 2018: Journal of AOAC International
Antonio J Nieto-García, Irene Domínguez, Roberto Romero-González, Francisco Javier Arrebola, José Luis Martínez Vidal, Antonia Garrido Frenich
Background : Automated methods are needed for the reliable determination of xenobiotics in environmental samples. Objective : Optimization and application of an automated method for the ultra-trace analysis of 34 organic contaminants including polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), organochlorinated (OCPs), and organophosphorus pesticides (OPPs) in sediment samples have been performed. Methods : Automated method based on headspace solid-phase microextraction (SPME) coupled to GC-high-resolution MS (GC-HRMS) for the ultra-trace analysis of the targeted compounds has been developed...
October 10, 2018: Journal of AOAC International
Quynh-Nhi Le, Susan Alles, Brooke Roman, Eric Tovar, Edan Hosking, Lei Zhang, Preetha Biswas, Benjamin Bastin, Patrick M Bird, Mark Mozola, Robert Donofrio
Background: Listeria Right NowTM is a novel, enrichment-free molecular method for detection of Listeria spp. in swab samples from environmental surfaces. The test provides results in real time, indicating the current or recent presence of Listeria spp. in the environment. After sampling, the entire contents of the swab are subject to sample processing, releasing large quantities of target ribosomal RNA molecules into the lysate. A portion of the lysate is then tested using the ANSR® for Listeria isothermal nucleic acid amplification assay...
October 10, 2018: Journal of AOAC International
Brianna Luckey, Vuyani Mekile
No abstract text is available yet for this article.
October 10, 2018: Journal of AOAC International
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