Determination of iminodiacetic acid and glycine in dehydrogenation products of diethanolamine by pre-column derivatization and high performance liquid chromatography

Zhang, Lei; Duan, Zhengkang; Zhu, Hongwen; Yin, Ke

doi:10.3724/sp.j.1123.2017.08006

Cited by 3 publications

(1 citation statement)

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“…The LOQ was 3 µg/kg in fish muscle samples [34], the recovery values of AVM and IVM was 78.8-88% in perch [35], and the LOQs of AVM and IVM in aquatic products detected by the same method were both 3 µg/kg within 23 min (mins) [36]. The residues of AVM, IVM, DOR, and MOX were determined simultaneously by HPLC-FLD, and the detection time of each sample was 25 min [37]. The detection method is time-consuming and inefficient.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Quantification of Avermectins in Six Aquatic Foods by UHPLC/FLD with Precolumn Derivatization

Sun

Liu

et al. 2023

Separations

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In this study, a fast, concise and reliable ultra-high performance liquid chromatography-fluorescence (UHPLC/FLD) detection method for simultaneous quantification of avermectins (AVMs), including avermectin (AVM), ivermectin (IVM), emamectin (EMM), moxidectin (MOX) and doramectin (DOR) in six aquatic foods was established. Based on the QuEChERS pretreatment method, the samples were extracted with 0.2% (v/v) ammonia acetonitrile. N-methyl imidazole mixed with acetonitrile (1:1, v/v) and trifluoroacetic anhydride with acetonitrile (1:2, v/v) were used as derivatization reagents. The mobile phase consists of acetonitrile and water with a flow rate of 1.0 mL/min. An Infinity Lab Poroshell 120 EC-C18 column was used for optimum chromatographic separation of target analytes at 40 °C; the excitation and emission wavelengths were set at 365 nm and 465 nm, respectively. In six kinds of aquatic foods, the limits of detection (LODs) of AVM, IVM, EMM, MOX, and DOR were 2.7 μg/kg, 1.8 μg/kg, 2.1 μg/kg, 1.2 μg/kg, and 2.7 μg/kg, respectively, and the limits of quantification (LOQs) of AVM, IVM, EMM, MOX, and DOR were 5 μg/kg, 4.5 μg/kg, 4.5 μg/kg, 3.5 μg/kg and 5.0 μg/kg, respectively. The recoveries were all above 85.38% when the samples were spiked with the target compounds at the concentration level of 5, 10, 50, and 100 μg/kg. The intra-day and inter-day relative standard deviations (RSDs) were all less than 15%. This method considers the requirements of sensitivity, accuracy, and economics of the instrument.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Quantification of Avermectins in Six Aquatic Foods by UHPLC/FLD with Precolumn Derivatization

Sun

Liu

et al. 2023

Separations

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Design and Applications of Photoresponsive Hydrogels

2019

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materials with diverse applications in var ious fields due to their tunable chemistry structure and physical properties as well as excellent biocompatibility. [2][3][4][5] Hydrogel research has evolved from static mate rials to smart ones, whose structures and property show responsiveness to external stimuli, including temperature, pH, light, electric or magnetic fields, and the pres ence of enzymes or ion concentrations. [6][7][8][9][10][11] This unprecedented level of control over material properties has driven both med ical and industrial fields into the realm of possibility: controlled drug delivery, [12] chemical sensors, [13] soft actuators or robotics, [14][15][16] or scaffolds for dynamic 3D cell culture. [17] Photoresponsiveness is attractive due to the inherent advan tages of light as stimulus. Light is non invasive and allows remote manipulation of materials without requiring additional reagents, thus, with limited byproducts. Modulation of irradiation parameters, such as light intensity and irradiation time, permits the pre cise control of irradiation dosage, thereby, the degree of photo reactions. Spatial control can be achieved in both 2D and 3D, and temporal control is possible by simply turning the respec tive light source on or off. Wavelengthselective photo chemical reactions can be used for orthogonal photomediation of hydrogel properties. [18] Photoresponsive hydrogels, as externally tunable materials, strongly contribute to the field of soft smart materials in regard to the abovementioned applications. [19] In this review, we elaborate on the design and the emerging appli cations of photoresponsive hydrogels. A comprehensive review about utilizing light for the formation of hydrogels is given by Mi and coworkers. [20] First, we discuss responsive modes and photochemical mechanisms of photoresponsive hydrogels. Fol lowing this, we highlight their applications for dynamic cell environments, smart biointerfaces, controlled drug delivery, photodriven actuators, and lighthealing materials. The review concludes with an outlook on the challenges and potential future approaches for photo responsive hydrogels. Light as Stimulus for Hydrogels Macroscopic Hydrogel PhotoresponsesThe interaction of light with photoresponsive hydrogels can result in different responses, some of which are observable with the bare eye. Those include hydrogel formation or degradation, network contraction or expansion, and chemical modifications in the network, which then have an immediate consequence on Hydrogels are the most relevant biochemical scaffold due to their tunable properties, inherent biocompatibility, and similarity with tissue and cell environments. Over the past decade, hydrogels have developed from static materials to "smart" responsive materials adapting to various stimuli, such as pH, temperature, chemical, electrical, or light. Light stimulation is particularly interesting for many applications because of the capability of contact-free remote manipulation of biomaterial properties and inherent spatial and t...

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Direct Determination of Diethanolamine in High Salinity Dehydrogenation Reaction Solutions by Ion Chromatography (IC)

Zhang,

Duan,

Zhao

et al. 2021

Analytical Letters

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Determination of iminodiacetic acid and glycine in dehydrogenation products of diethanolamine by pre-column derivatization and high performance liquid chromatography

Cited by 3 publications

References 0 publications

Simultaneous Quantification of Avermectins in Six Aquatic Foods by UHPLC/FLD with Precolumn Derivatization

Simultaneous Quantification of Avermectins in Six Aquatic Foods by UHPLC/FLD with Precolumn Derivatization

Design and Applications of Photoresponsive Hydrogels

Direct Determination of Diethanolamine in High Salinity Dehydrogenation Reaction Solutions by Ion Chromatography (IC)

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