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Arsenic species in electronic cigarettes:Determination and potential health risk

Journal of Environmental Sciences 2020年第5期32卷 168-176页

作者： Qingqing Liu chengzhi huang XChris Le Chongqing Key Laboratory of Biomedical Analysis(Southwest University) Chongqing Science&Technology CommissionCollege of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China College of Resources and Environment Southwest UniversityChongqing400715China Key Laboratory of Luminescent and Real-Time Analytical System Chongqing Science and Technology BureauCollege of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China Department of Laboratory Medicine and Pathology Faculty of Medicine and DentistryUniversity of Alberta10102 Clinical Sciences BuildingEdmontonAlberta T6G 2G3Canada

Human exposure to contaminants from electronic cigarettes(e-cigarettes)and the associated health effects are poorly *** has been no report on the speciation of arsenic in e-liquid(solution used for e-cigarettes)and *** report here determination of arsenic species in e-liquids and aerosols generated from vaping the *** e-liquid samples of major brands,purchased from local and online stores in Canada and China,were analyzed for arsenic species using high-performance liquid chromatography and inductively coupled plasma mass *** condensed from vaping the eliquids were also analyzed and compared for arsenic *** arsenic species were detected,including inorganic arsenate(iAsⅤ),arsenite(iAsⅢ),monomethylarsonic acid(MMA),and three new arsenic species not reported *** e-liquids,iAsⅢwas detected in 59%,iAsⅤin 94%,and MMA in 47%of the *** the condensate of aerosols from vaping the e-liquids,iAsⅢwas detected in 100%,iAsv in 88%,and MMA in 13%of the *** arsenic species were predominant in e-liquids and aerosols of *** concentration of iAsⅢin the condensate of aerosols(median 3.27μg/kg)was significantly higher than that in the e-liquid(median 1.08μg/kg)*** concentration of inorganic arsenic in the vaping air was approximately 3.4μg/m3,which approaches to the permissible exposure limit(10μg/m3)set by the United States Occupational Safety and Health Administration(OSHA).According to the Environmental Protection Agency’s unit risk factor(4.3×10-3 perμg/m3)for inhalation exposure to inorganic arsenic in the air,the estimated excess lung cancer risk from lifetime exposure to inorganic arsenic in the ecigarette vaping air(3.4μg/m3),assuming e-cigarette vaping at 1%of the time,is as high as1.5×*** results raise health concerns over the exposure to arsenic from electronic cigarettes.

关键词： Electronic cigarettes E-liquid E-cigarette aerosol Arsenic speciation Inhalation exposure Metals Lung cancer risk

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Current diagnostic and therapeutic strategies for COVID-19

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Journal of Pharmaceutical Analysis 2021年第2期11卷 129-137页

作者： Binbin Chen Mengli Liu chengzhi huang College of Chemistry and Chemical Engineering Southwest UniversityChongqing400715China School of Chemistry&Molecular Engineering East China University of Science and TechnologyShanghai200237China Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationSouthwest UniversityChongqing400715China Key Laboratory of Luminescence and Real-Time Analytical System Chongqing Science and Technology BureauCollege of Pharmaceutical ScienceSouthwest UniversityChongqing400715China

The outbreak and spread of novel coronavirus disease 2019(COVID-19) with pandemic features, which is caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2), have greatly threatened global public health. Given the perniciousness of COVID-19 pandemic, acquiring a deeper understanding of this viral illness is critical for the development of new vaccines and therapeutic options. In this review, we introduce the systematic evolution of coronaviruses and the structural characteristics of SARS-CoV-2. We also summarize the current diagnostic tools and therapeutic strategies for COVID-19.

关键词： Diagnosis Treatment COVID-19 Coronavirus SARS-CoV-2

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Single scattering particles based analytical techniques

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Chinese Science Bulletin 2013年第18期58卷 1969-1979页

作者： LIU Yue huang chengzhi Education Ministry Key Laboratory on Luminescence and Real-Time Analysis School of Chemistry and Chemical EngineeringSouthwest University College of Pharmaceutical Science Southwest University

Single scattering particles,especially noble metal(plasmonic) nanoparticles,based analytical techniques are attractive recently and becoming the research focus of the light scattering analytical *** this mini review,we summarize the single scattering particles based analytical techniques in the past decade including single scattering particles counting,single plasmonic nanoparticles sensing,and single plasmonic nanoparticles tracking/*** emphasize the discussion on the single plasmonic nanoparticles sensing that combines with dark-field microscopy and resonant Rayleigh scattering spectroscopy.

关键词：散射粒子技术基础共振瑞利散射光谱纳米粒子暗场显微镜粒子计数成像分析

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Facile synthesis of gold nanoflowers as SERS substrates and their morphological transformation induced by iodide ions

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Science China Chemistry 2016年第8期59卷 1045-1050页

作者： Shujun Zhen Tong Wu Xin huang Yuanfang Li chengzhi huang Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of Education College of Chemistry and Chemical Engineering Southwest University 400715 Chongqing China Department of ChemiStry and Chemical Engineeringl Yibin University Yibin 644000 China College of Pharmaceutical Science Southwest University Chongqing 400715 China

We report a new strategy to prepare gold nanoflowers （AuNFs） using a two-step seed-mediated method. The as-prepared AuNFs were employed as surface-enhance Raman scattering （SERS） substrates, showing strong signal enhancement. We further found that iodide ions （I^-） could selectively induce the morphological transformation of AuNFs to spheres, resulting in a blue-shift of the localized surface plasmon resonance （LSPR） bands, a color change of the AuNFs solution from blue to red, and decreased SERS activity. This behavior allows the AuNFs to be used in the determination of I^-.

关键词： gold nanoflowers SERS iodide ions

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Investigations on the amalgamation of gold nanorods by iodine and the detection of tetracycline

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Science China Chemistry 2009年第2期52卷 188-195页

作者： Jian Wang Hao Wu chengzhi huang 1. Key Laboratory of Luminescence and Real-Time Analysis of Ministry of Education College of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China

The morphological transformation process of gold nanorods (Au-NRs) resulting from the reaction between tetracycline and iodine was monitored by the plasmon resonance absorption (PRA) spectra and the scanning electron microscope (SEM) images. It was found that iodine could fuse Au-NRs into sphericity with the lower aspect ratio and blue shift of the longitudinal PRA band. It was found, however, that the presence of tetracycline, since it can react with I2, decreases the effective concentration of I2 and its fusion effect on Au-NRs. As a result, the longitudinal PRA of Au-NRs shifts to longer wavelength linearly with increasing the concentration of tetracycline. With that, tetracycline can be detected in the range of 5.0×10∮5- 5.0×10−4 mol·L−1, with a limit of determination (LOD) of 2.4×10−6 mol·L−1 (3σ). Most foreign substances in the samples did not interfere in the detection, and tetracycline in the synthetic samples could be detected with the recovery in the range of 92.8%–107.2%, and RSD lower than 4.3%. The concentration of tetracycline in milk detected with standard addition method was so low that it accorded with the safety regulation.

关键词： gold nanorods iodine tetracycline hydrochloride plasmon resonance absorption

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Development of nitrogen and sulfur-doped carbon dots for cellular imaging

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Journal of Pharmaceutical Analysis 2019年第2期9卷 127-132页

作者： Hui Liu Yue Zhang chengzhi huang Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of EducationCollege of Pharmaceutical SciencesSouthwest University Chongqing Key Laboratory of Biomedical Analysis (Southwest University) Chongqing Science & Technology CommissionCollege of Chemistry and Chemical EngineeringSouthwest University

Heteroatom-doped carbon dots(CDs) have attracted extensive interest because of their improved electronic and fluorescence properties with heteroatom doping. In this study, a new synthetic method for nitrogen(N) and sulfur(S)-doped CDs was developed via a hydrothermal method using methionine and citric acid as raw materials. The as-prepared CDs exhibit excellent optical properties and good biocompatibility. The spherical N,S-doped CDs have an average diameter of 5 nm. They consist of C, O, N and S, and take on excellent water solubility due to the hydroxyl and carboxyl, amino groups on the *** CDs have a photoluminescence quantum yield of 13.8% using quinine sulfate as a reference; the average fluorescence lifetime of the CDs was 3.67 ns. The CDs solution present good photoluminescence properties, and the maximum excitation wavelength and emission wavelength locate at 330 nm and405 nm, respectively. In addition, their fluorescence intensity almost does not change under the conditions of acid, alkali, and high salt, which indicated their anti-photobleaching property and good light stability. Based on the good biocompatibility and strong fluorescence emission of the CDs, they can be used as fluorescent imaging reagents.

关键词： N,S-doped carbon dots Fluorescent reagent Cellular imaging

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Multi-walled carbon nanotubes based catalyst plasmon resonance light scattering analysis of tetracycline hydrochloride

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Science China Chemistry 2008年第9期51卷 866-871页

作者： HU Po huang chengzhi ZHANG Li College of Chemistry and Chemical Engineering MOE Key Laboratory on Luminescence and Real-Time AnalysisSouthwest Uni-versityChongqing 400715China

It was found that multi-walled carbon nanotubes (MWNTs) could catalyze the redox reaction between chlorauric acid (HAuCl4) and reductive drugs such as tetracycline hydrochloride (TC), producing gold nanoparticles (Au NPs). By measuring the plasmon resonance light scattering (PRLS) signals of the resulting Au NPs, tetracycline hydrochloride can be detected simply and rapidly with a linear range of 4―26 μmol/L, a correlated coefficient (r ) of 0.9955, and a limit of detection (3σ) of 6.0 nmol/L. This method has been successfully applied to the detection of tetracycline hydrochloride tablets in clinic with the recovery of 101.9% and that of fresh urine samples with the recovery of 98.3%―102.0%.

关键词： MWNTs chlorauric acid tetracycline hydrochloride plasmon resonance light scattering

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Shape- and size-dependent catalysis activities of iron-terephthalic acid metal-organic frameworks

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Science China Chemistry 2015年第10期58卷 1553-1560页

作者： Yali Liu Pengfei Gao chengzhi huang Yuanfang Li Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of Education College of Chemistry and Chemical Engineering Southwest University College of Pharmaceutical Science Southwest University

Precise control of the size and morphology of metal-organic frameworks(MOFs) presents an important direction for extending these inorganic-organic materials to many more advanced applications. However, because of the limit of the crystal-growth rule and mechanism, good-control of the size and morphology of MOFs remains challenging. In this contribution, an iron-terephthalic acid metal-organic framework with different shapes(octahedron, spindle and bipyramidal hexagonal) was easily and reproducibly synthesized via a solvothermal method. Sodium acetate and glycerol were used as modulators. Mechanism studies showed that the crystal nucleation rate and orientational growth both play important roles in determining the final shape of the MOFs. Further investigations showed that the as prepared MOFs exhibit shape-dependent catalytic activities, which means that MOFs can be designed to perform different catalytic functions. This investigation not only provides an effective guideline for the precise control of the size and morphology of metal-organic frameworks, but also extends MOFs to much more advanced applications in terms of catalyst chemistry.

关键词： controllable synthesis metal-organic frameworks catalytic activity

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Polarized synchronous light scattering characterization of the interaction of proteins with sodium dodecyl sulfonate

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Chinese Science Bulletin 2007年第4期52卷 456-460页

作者： ZHAO XiaoHui huang chengzhi College of Chemistry and Chemical Engineenng Southwest University Chongqing 400715 China

In acid buffer solution, proteins with positive charge can react with anion surfactant and result in a great enhancement of synchronous light scattering (SLS) signals. In this contribution, the correlative experiment was made to compare the interaction of human serum albumin (HSA) and immunoglobulin G (IgG) with sodium dodecyl sulfonate (SDS). Based on the measurements of the polarization light scattering signals, a new method of scattering polarization was constituted to distinguish these two interaction systems with molecular weight difference (HSA 66 kDa; IgG 150 kDa). The results were con- sistent with the data measured by dynamic light scattering (DLS) technique.

关键词：人血清白蛋白免疫球蛋白蛋白质十二烷基磺酸钠相互作用偏振光散射

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Hybridization chain reaction triggered controllable one-dimensional assembly of gold nanoparticles

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Science China Chemistry 2016年第11期59卷 1513-1518页

作者： Jian Wang Yuqing Du Shaoqing Lie chengzhi huang Key Laboratory of Luminescence and Real-Time Analytical Chemistry Ministry of Education College of Pharmaceutical Sciences Southwest University College of Chemistry and Chemical Engineering Southwest University

Assembling and ordering nanomaterials into desirable patterns are considerably significant,since the properties of nanomaterials depend not only on the size and shape,but also on the spatial arrangement among the collective building *** this work,the DNA self-assembly technology of hybridization chain reaction(HCR) provided a convenient method to yield long double-strand DNA(dsDNA) to install gold nanoparticles(AuNPs) into one dimensional assembly along the skeleton of ***,the tunable length of AuNPs assemblies along dsDNA chain could be achieved by adjusting the reaction time of HCR,which is based on the formation of covalent bond between Au and the-SH group of *** with weak light scattering of single AuNP,these AuNPs assemblies could be clearly imaged under the dark field microscopy,indicating that the light scattering was greatly improved after assembling.

关键词： gold nanoparticles(AuNPs) hybridization chain reaction(HCR) double-strand DNA(dsDNA) one-dimensional assembly

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