CHROMATOGRAPHIA
·
2021
·Vol. 84
·期 3
·219-231
·
IF 2.044
Wang Yu,Zhou Qianru,Yang Wei,Yang Qianzhan,Zhang Xuejing,Yue Xiaochun
Taste-and-odor occurrence has extensive socio-economic impacts on drinking water, which is now a public health concern. Sulfur odorants can significantly affect the esthetic quality of drinking water and arouse unpleasant organoleptic experience of consumers, which can also harm the human body at high concentration levels. Researches on analysis of sulfur odorants in air and environmental water are numerous, while the reports on analysis of them in tap water are few. The analysis of sulfur odorants in tap water is quite different with it in environmental samples owing to the treatment of the water plant, such as the introduction of disinfectants. In this paper, a novel and practical method for determining the dimethyl disulfide (DMDS) and dimethyl trisulfide (DMTS) in tap water and source water by purge-and-trap coupled to gas chromatography–mass spectrometry (GC–MS) analysis was proposed. The evaluations of sample preservation were performed due to the adverse impact caused by the remaining disinfectant in tap water on the analysis of DMDS and DMTS, including the investigation on the selection and the dosage of preservatives. Besides, aspects affecting the preconcentration procedure and GC–MS analysis of DMDS and DMTS were investigated as well. Moreover, the proposed method was validated by five independent laboratories from different regions of China, representing a good linearity with correlation coefficients ( r ) ranged from 0.9990 to 0.9999 for both DMDS and DMTS between the concentrations of 10 ng L −1 and 100 ng L −1 . The method detection limit (MDL) and limit of quantification (LOQ) of DMDS and DMTS were 3 ng L −1 and 10 ng L −1 , respectively. Meanwhile, satisfactory precision and accuracy were also obtained when the method was applied to detect DMDS and DMTS in tap water and source water. The relative standard deviation (RSD) was 0.90–7.3% for DMDS and 1.1–7.6% for DMTS, and the recovery was 81.2–120% for DMDS and 73.6–118% for DMTS. Furthermore, the repeatability limits and reproducibility limits of DMDS and DMTS were acquired, ranging from 0.631 to 5.71 at low, medium and high concentrations. The proposed method is an effective, environmentally friendly, and promising approach for routine monitoring of DMDS and DMTS in tap water and source water.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2012
·
IF 2.733
Na Sheng,Fangdi Wei,Wen Zhan,Zheng Cai,Shuhu Du,Xuemin Zhou,Fei Li,Qin Hu
A unique stir bar coated with dummy molecularly imprinted polymers for bisphenol A was prepared by sol-gel technique. The scanning electron microscopic image of the coating presented a homogeneous surface with a thickness of about 57 ± 2.5 μm. The Fourier transform infrared spectrum of the coating proved the incorporating of dummy molecularly imprinted polymers with the sol-gel network. When used to extract bisphenol A from aqueous solution containing bisphenol A and its three analogs (4-tert-butylphenol, 4,4′-dihydroxybiphenyl, and 3,3′,5,5′-tetrabromo-bisphenol A). Dummy molecularly imprinted polymers-coated stir bar showed better selectivity than the bars coated with polydimethylsiloxane or non-imprinted polymers. The extraction conditions including stirring speed, pH, and extraction time were optimized. After back extraction with methanol, the extracts were analyzed by high-performance liquid chromatography-fluorescence detection. The linear range was 0.0228–0.456 ng/mL with correlation coefficient of 0.9994 and the detection limit was about 5.70 × 10 −3 ng/mL based on three times ratio of signal-to-noise. The method was applied to the determination of trace bisphenol A in tap water.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Huaifang Fang,Jie Zhang,Shu Zhou,Wei Dai,Chunya Li,Dongyun Du,Xinyu Shen
Atomic layers of antimony were electrodeposited onto glassy carbon electrode in overpotential region. The antimony deposition was characterized by chronocoulometry and scanning electron microscopy. Based on the excellent electrochemical properties of the glassy carbon/antimony system, a simple method was developed for rapid and reliable determination of ultra-trace Sb(V) by square-wave anodic stripping voltammetry. The key operational parameters of influencing the electroanalytical response of Sb, such as deposition potential, deposition time, and composition of the measurement solution, were investigated. Under the optimized condition, the method provided a linear calibration ranging from 1 to 16 pg L −1 with a respective correlation coefficient of 0.9906. The detection limit was 1.64 fmol L −1 , which is the lowest ever reported for an electroanalytical technique and one of the lowest analytical methods for Sb(V) determination. The relative standard deviation for a Sb(V) solution (5 pg L −1 ) was 3.2% for eight successive assays. Finally, the method was applied to the determination of antimony in tap water and compared with inductively coupled plasma mass spectrometry technique.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yujiao Sun,Juanjuan Zhao,Bo-Tao Zhang,Jie Li,Yongbin Shi,Yang Zhang
Chloroxylenol (PCMX) degradation by thermally activated persulfate (TAP) in aqueous solution and the toxicity changes of the system were investigated. PCMX oxidative degradation followed a pseudo-first-order kinetic model. The apparent activation energy of PCMX degradation was calculated to be 130.0 kJ·mol −1 , according to the Arrhenius equation, over the range of 30–60 °C. The PCMX degradation efficiency was significantly increased with the reaction temperature and initial persulfate concentration, while it was not influenced by the initial solution pH or water matrices. The hydroxyl radicals and sulfate radicals (SRs) in the TAP system were proved by electron paramagnetic resonance (EPR) spectroscopy. SRs were the predominant radical species at neutral pH, as verified by radical scavenging tests. The possible degradation pathways, including electron transfer, dechlorination, aromatic ring oxidation, side-chain oxidation and a subsequently opening aromatic ring, were proposed based on intermediate detection. The acute toxicity and genotoxicity of the PCMX degradation solution were estimated by the Escherichia coli and Acinetobacter baylyi ADP1_recA_lux bioreporter, respectively. The results suggested that TAP was a feasible and environmentally friendly technology for PCMX-contaminated water remediation.
研究领域:
环境科学
·
化学工程
·
水处理
·
毒理学
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 54
·32897-32905
·
IF 3.119
Xinyue Chen,Jiahui Ji,Gengen Shi,Zhiyuan Xue,Xianglin Zhou,Lianggong Zhao,Shilan Feng
This study linked natural plant materials and nanomaterials; reporting an environmentally friendly, non-toxic and efficient method for the green synthesis of gold nanoparticles (AuNPs) using an ethyl acetate extract of Radix Hedysari (EAR). The components of the extract were identified using HPLC and it was found that formononetin accounted for more than 90% of the total contents. We predicted that formononetin in EAR plays a crucial role in green synthesis. Thus, formononetin was used as a standard reductant to synthesize AuNPs, and the result confirmed our prediction. The synthetic mechanism was also discussed in detail in the article. Moreover, EAR–AuNPs realized the sensitive and selective colorimetric detection of ferrous ions (Fe2+) among other metal ions, and were applied to spiked tap water with a low detection limit of 1.5 μM in a wide range from 10 μM to 500 μM. EAR–AuNPs were green synthesized using Radix Hedysari extract for the first time and were successfully applied in real sample detection.
研究领域:
纳米生物学
·
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2014
·
IF 4.258
Xiaoli Sun,Jincheng Wang,Yun Li,Jing Jin,Baoqin Zhang,Syed Mazhar Shah,Xueli Wang,Jiping Chen
A simple and fast method for both dummy template selection and polymer composition optimization is proposed here. A series of dummy templates for bisphenols imprinting were screened by running them on a non-imprinted polymer (NIP) column with porogen solvent as mobile phase. The tested dummy templates mainly involved bisphenol S (BPS), bromobisphenol A (TBBPA), bisphenol F (BPF), bisphenol E (BPE), bisphenol B (BPB), bisphenol AF (BPAF), 2,2′,6,6′-tetramethyl-4,4′-sulfonyldiphenol (BS-TM) and 4,4′-diaminodiphenylmethane (DADPM). Different monomers and porogens were also investigated for BPS and DADPM using the same method. BPS dummy template was finally selected with acetonitrile and 4-VP as porogen and monomer. The resulting dummy molecularly imprinted polymer (DMIP) achieved superior affinities for BPF, BPE, BPA, BPB and BPAF with imprinting factors 14.5, 13.8, 8.7, 5.7 and 4.2, respectively. An efficient method based on BPS-DMIP-SPE coupled with HPLC-UV was developed for selective extraction of BPF, BPE, BPA, BPB and BPAF in water samples. The method showed excellent recoveries (89.4–102.0%) and precision (RSD 0.3–4.8%, n = 5) for tap and river water samples spiked at three concentration levels each (40, 200 and 1000 ng L −1 ). The detection limits ranged between 2.2 and 3.8 ng L −1 with a sample volume of 500 mL. The result demonstrated the superiority of the optimized method for selective extraction of BPs in water samples at the ng L −1 level.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Qiu-Ting Huang,Si-Qi Pan,San-Lei Wang,Hong-Bo Gong,Wei-Li Wang,Wei-Ye Hu,Quan-Long Li,Bin Ren,Zhong-Qun Tian,Guo-Kun Liu
As a key anion in the biogeochemical cycle and life science, the analysis of trace-level sulfate anion (SO42–) is a routine yet laborious laboratory task. Traditional lab-based methods are inadequate for real-time, high-spatiotemporal-resolution screening and tracking on national/global scales. To address this challenge, a surface-enhanced Raman spectroscopy (SERS)-based strategy was developed, achieving sensitive qualitative analysis (≥1 μg/L) within 1 min/sample and accurate quantitative analysis (relative standard deviation < 10%) within 3–5 min/sample for SO42– in diverse water samples. The selective capture and detection of SO42– are realized via intermolecular hydrogen bonding with the adsorbed thiourea, using positively charged Au NPs as the SERS substrate. The rapid screening of SO42– levels in tap water from major cities across China displayed high spatial heterogeneity, consistent with recently reported theoretical prediction, influenced by an overall interplay of climatic, hydro-geochemical, and anthropogenic drivers. Critically, this SERS platform is expected to establish a high-throughput sensing framework for monitoring SO42– dynamics on national/global scales, generating spatially resolved real-time data sets that empower data-driven sulfur cycle modeling. Moreover, it holds potential to revolutionize real-time environmental monitoring of other environmentally relevant anions, such as nitrate, nitrite, and perchlorate.
研究领域:
环境科学
·
分析化学
·
水质监测
·
纳米技术
·
光谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·
IF 5.8
Xiong Zengheng,Wu Yan,Zhou Yang,He Shuhai,Huang Danyu,Zhang Mingshan,Jiang Yanjun,Cheng Long,Zhao Zhendong,Zhao Hongwei,Lin Huan
Neonicotinoids (NEOs) pesticides are widely used around the world, especially in the tropics with greater frequency and intensity. However, little is known about NEOs residue in drinking water of tropics. In this study, a highly efficient method using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was established for determining eight NEOs in source water and tap water of Hainan Island, China. The method adopted a high-throughput direct aqueous injection without sample concentration steps, with a rapid analyzing period of 5.0 min, method detection limits (MDLs) in the range of 0.84–1.82 ng/L and the average recoveries ranged from 83% to 116%. NEOs were detected in all source water samples and at an upper level as compared with other parts of China. The most frequently detected NEO was imidacloprid with a detection frequency of 94%, followed by clothianidin (88%) and thiamethoxam (78%), with maximum concentrations of 86.4, 164, and 188 ng/L, respectively. Moreover, seasonal and spatial variations had remarkable impacts on NEO contamination in source water. Drinking water treatment processes removed approximately 20% of NEOs from surface water. However, 90% of tap water samples contained at least one NEO, With 3 samples’ concentration of single NEO exceeding the acceptable value recommended by the European Union (100 ng/L). Therefore, the risk of human exposure through drinking water was evaluated for 4 age group and 2 genders. Young children aged 9 months to 3 years old were found to have the highest risk, with the median exposure up to 4 times greater than teenagers and adults. Next, water intake is likely only a small part of the daily intake of these individuals, thus the potential health problems caused by NEOs present in the tap water of Hainan should not be ignored.
研究领域:
环境科学
·
毒理学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 5
·期 9
·4359-4367
·
IF 8.262
Yong Li,Shuan Wang,Yan-Bing He,Linkai Tang,Yusuf Valentino Kaneti,Wei Lv,Zhiqun Lin,Baohua Li,Quan-Hong Yang,Feiyu Kang
Titanium oxide (TiO2) has attracted great interest as a promising anode material for lithium (Li) ion batteries (LIBs) and sodium (Na) ion batteries (SIBs). However, the key factors that dictate the Li-ion and Na-ion storage and transportation in TiO2 remain unclear. Herein, we report a facile hydrolysis route to crafting a variety of high tap-density TiO2 spheres with controllable size and hierarchical pores. The Li-ion and Na-ion storage properties based on these TiO2 spheres were systematically investigated. The pore distribution and the size of TiO2 spheres were found to exert profound influence on the Li-ion and Na-ion storage and transportation. The Li-ion storage and transportation in dense TiO2 spheres was dependent mainly upon the micropore distribution and volume and independent of the size of spheres. In contrast, the excellent Na-ion storage and transportation in TiO2 spheres was enabled by the loose structure with a large macroscopic pore volume and shortened Na-ion diffusion length. High tap-density TiO2 spheres (1.06 g cm−3) with superior Li-ion and Na-ion storage properties were produced, exhibiting a Li-ion storage specific capacity of 189 mA h g−1 at 1C and a high capacity retention of 88.1% after 100 cycles, and a Na-ion storage specific capacity of 184 mA h g−1 at 1C and capacity retention of 90.5% after 200 cycles. The ability to understand the critical factors controlling the Li-ion and Na-ion storage in high tap-density TiO2 spheres enables their implementation for practical applications in Li-ion and Na-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 12
·9676-9683
·
IF 3.201
Fengjuan Liu,Yao Jiang,Chuan Fan,Liyan Zhang,Yue Hua,Chunxian Zhang,Ning Song,Yingjie Kong,Hua Wang
Fluorimetric and colorimetric analysis strategies have been developed for simultaneously probing Fe3+ and Fe2+ ions in blood or tap water using nitrogen-doped carbon dots (N-Cdots). Herein, the N-Cdots were prepared using melamine by a neutralization heat reaction one-step synthesis route showing high aqueous solubility and environmental stability. Importantly, unlike common carbon dots (Cdots) that generally display one emission of blue fluorescence, they can display excitation-dependent tunable emissions. Moreover, the bright blue-green fluorescence of N-Cdots could be specifically quenched by Fe3+ or Fe2+ ions simultaneously, showing a color change. Herein, the fluorescent quenching of N-Cdots is thought to result from the aggregation of N-Cdots triggered by the unique coordination interactions between Fe3+ or Fe2+ ions and amine and amide groups of N-Cdots. The developed analysis strategies were employed for the evaluation of the total iron levels in blood or tap water, with a detection limit down to about 5.0 nM, exemplified for Fe3+ ions. These strategies could be promising for use in practical applications for the clinical diagnosis of iron-relative diseases (i.e., anemia and cancers) and environmental monitoring of iron pollution. In addition, this one-step neutralization heat reaction route as a facile green synthesis candidate may be tailored for the fabrication of a variety of Cdots, especially those with doped heteroatoms (i.e., nitrogen) for extensive applications in biomedical and environmental fields.
研究领域:
分析化学
·
生物医学工程
·
环境科学
·
临床检验
·
纳米医学
·
分子诊断
·
毒理学
·
转化医学
✓ 已验证
DOI
高影响因子
CHROMATOGRAPHIA
·
2024
·
IF 1.2
Huang Zhongping,Wu Ermiao,Shi Dongliang,Zhang Jingkun,Shen Zhenlu,Zheng Ruixing,Shen Jian
The quantification analysis of microplastics (MPs) in bottled water, purified tap water and branded table salt was executed by double-shot pyrolysis–gas chromatography/mass spectrometry (Py–GC/MS), and the concentration was expressed as a mass concentration, which was more suitable for the data comparison. MPs including polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polystyrene (PS) and polyethylene (PE) were separated by filtration with glass fiber filter membranes. After being folded, the whole glass filter membrane containing MPs was transferred into a pyrolysis cup directly to avoid the sample loss during transfer. The characteristic pyrolysates were used to identify and quantify PMMA, PET, PC, PP, PS and PE. The linear relationships were found between the polymer weight amount and peak areas of each characteristic pyrolysates with the correlation coefficients larger than 0.993. The intra-day precisions of the pyrolysates for peak areas were 0.56–18.94%, and the inter-day variability was 8.47–19.88%. The recovery values of the spiked standards were in a range of 81.5–114.5%. MPs in bottled water, purified tap water and branded table salt samples were successfully quantified by the proposed Py–GC/MS method. For four brands of bottled water samples, 0.088 μg/L PET was found in one sample. PP was detected in all purified tap water samples from five brands with the concentrations between 0.028 and 0.489 μg/L, and PE was detected in purified tap water samples from two brands with the concentrations between 0.194 and 1.26 μg/L. As for nine table salt samples, PP were found in a range of 4.00–182.80 μg/100 g salt in eight table salt samples. Due to the high content of MPs in purified tap water samples and large daily consumption, the estimated daily intake (EDI) of MPs from purified tap water was calculated. The estimated daily intakes (EDIs) for adults are 2.57 ng PP/kg/d and 4.17 ng PE/kg/d from purified tap water; the EDIs for children are 5.63 ng PP/kg/d and 9.11 ng PE/kg/d from purified tap water.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2015
·Vol. 38
·期 19
·3412-3420
·
IF 2.737
Hao Sun,Yun Li,Chaonan Huang,Junyu Peng,Jiajia Yang,Xiaoli Sun,Shuliang Zang,Jiping Chen,Xiangdong Zhang
This work reports the preparation of molecularly imprinted polymer particles for the selective extraction and determination of four benzophenones from aqueous media. The polymer was prepared by using 4-vinylpridine as functional monomer, ethylene glycol dimethacrylate as cross-linker, acetonitrile as porogenic solvent and 2,2’,4,4’-tetrehydroxybenzophenone as template. Good specific adsorption capacity ( Q max = 27.90 μmol/g) for 2,2’,4,4’-tetrehydroxybenzophenone was obtained in the sorption experiment and good class selectivity for 2,2’,4,4’-tetrehydroxybenzophenone, 2,4-dihydroxybenzophenone, 2,2’-dihydroxy-4-methoxybenzophenone, 2,2’-dehydroxy-4,4’-dimethoxybenzophenone was demonstrated by the chromatographic evaluation experiment. Factors affecting the extraction efficiency of the molecularly imprinted solid-phase extraction procedure were investigated systematically. An accurate and sensitive analytical method based on the molecularly imprinted solid-phase extraction coupled with high-performance liquid chromatography and diode array detection has been successfully developed for the simultaneous determination of four benzophenones from tap water and river water with method detection limits of 0.25–0.72 ng/mL. The recoveries of benzophenones for water samples at two spiking levels (500 and 5000 ng/mL for each benzophenone) were in the range of 86.9–103.3% with relative standard deviations ( n = 3) below 9.2%.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）