PMID- 31980265
OWN - NLM
STAT- MEDLINE
DCOM- 20200624
LR  - 20200624
IS  - 1873-3778 (Electronic)
IS  - 0021-9673 (Linking)
VI  - 1618
DP  - 2020 May 10
TI  - Ultrasound-assisted synthesis of clover-shaped nano-titania functionalized 
      covalent organic frameworks for the dispersive solid phase extraction of 
      N-nitrosamines in drinking water.
PG  - 460891
LID - S0021-9673(20)30068-6 [pii]
LID - 10.1016/j.chroma.2020.460891 [doi]
AB  - In this study, three batches of nano-titania functionalized covalent organic 
      frameworks were acquired depending on different solvothermal reaction stages 
      (24 h, 48 h and 72 h), which were named as single roll-up shaped nano-titania 
      functionalized COFs (SSTF-COFs), double roll-up shaped nano-titania 
      functionalized COFs (DSTF-COFs) and clover-shaped nano-titania functionalized 
      covalent organic framework (CSTF-COFs), respectively. After comparing their 
      extraction performances, the more efficient and stable CSTF-COFs were selected as 
      sorbent for the dispersive solid phase extraction (dSPE) of eight target 
      N-nitrosamines in drinking water, followed by the determination with liquid 
      chromatography-tandem quadrupole mass spectrometry (LC-MS/MS). Owing to the 
      introduction of hydroxy groups, CSTF-COFs showed high extraction efficiency for 
      N-nitrosamines with a wide range of polarities through hydrogen bonding 
      interaction, hydrophobic interaction and hydrophilic interaction. Under optimum 
      conditions, the developed method provided relatively low limits of detection 
      (0.13-2.45 ng/L) and satisfactory recoveries (88.6-105.5%), with relative 
      standard deviations (RSDs) less than 8.3%. Therefore, with the assistance of 
      CSTF-COFs, trace levels of N-nitrosamines were quantitatively and sensitively 
      determined in 31 out of 460 bottled drinking water samples in a sensitive and 
      convenient way.
CI  - Copyright (c) 2020. Published by Elsevier B.V.
FAU - Zhang, Yun
AU  - Zhang Y
AD  - Department of Chemistry, Zhejiang University, Hangzhou 310027, China.
FAU - Zhao, Yong-Gang
AU  - Zhao YG
AD  - Department of Chemistry, Zhejiang University, Hangzhou 310027, China.
FAU - Muhammad, Nadeem
AU  - Muhammad N
AD  - Department of Environmental Engineering, Wuchang University of Technology, Wuhan 
      430223, China.
FAU - Ye, Ming-Li
AU  - Ye ML
AD  - College of Biological and Environmental Engineering, Zhejiang Shuren University, 
      Hangzhou 310015, China. Electronic address: 2858749716@qq.com.
FAU - Zhu, Yan
AU  - Zhu Y
AD  - Department of Chemistry, Zhejiang University, Hangzhou 310027, China. Electronic 
      address: zhuyan@zju.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20200115
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Drinking Water)
RN  - 0 (Metal-Organic Frameworks)
RN  - 0 (Nitrosamines)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Chromatography, Liquid
MH  - Drinking Water/*chemistry
MH  - Limit of Detection
MH  - Metal-Organic Frameworks/*chemical synthesis
MH  - Nitrosamines/analysis/*isolation & purification
MH  - *Solid Phase Extraction
MH  - Tandem Mass Spectrometry
MH  - Titanium/chemistry
MH  - *Ultrasonic Waves
MH  - Water Purification/*methods
OTO - NOTNLM
OT  - Dispersive solid phase extraction
OT  - Drinking water
OT  - Liquid chromatography-tandem quadrupole mass spectrometry
OT  - N-nitrosamines
OT  - Nano-titania functionalized covalent organic frameworks
COIS- Declaration of Competing Interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2020/01/26 06:00
MHDA- 2020/06/25 06:00
CRDT- 2020/01/26 06:00
PHST- 2019/12/12 00:00 [received]
PHST- 2020/01/14 00:00 [accepted]
PHST- 2020/01/26 06:00 [pubmed]
PHST- 2020/06/25 06:00 [medline]
PHST- 2020/01/26 06:00 [entrez]
AID - S0021-9673(20)30068-6 [pii]
AID - 10.1016/j.chroma.2020.460891 [doi]
PST - ppublish
SO  - J Chromatogr A. 2020 May 10;1618:460891. doi: 10.1016/j.chroma.2020.460891. Epub 
      2020 Jan 15.