PMID- 33078194
OWN - NLM
STAT- MEDLINE
DCOM- 20210625
LR  - 20210625
IS  - 1944-7922 (Electronic)
IS  - 1060-3271 (Linking)
VI  - 104
IP  - 1
DP  - 2021 Mar 5
TI  - Fibrous g-C3N4@Tio2 Nanocomposites-Based Dispersive Micro-Solid Phase Extraction 
      for Chromium Speciation in Cow Milk by ICP-MS after Digestion Treatment with 
      Artificial Gastric Juice.
PG  - 129-136
LID - 10.1093/jaoacint/qsaa118 [doi]
AB  - BACKGROUND: Chromium is an interesting element because its toxicity depends on 
      its speciation. Thus, knowledge of Cr speciation in cow milk is essential to 
      human health. OBJECTIVE: This study aims to achieve real bioaccessible species in 
      cow milk, including Cr(III), Cr(VI), residual, digestible, and total Cr. METHODS: 
      Samples were treated with artificial gastric juice, followed by dispersive 
      micro-solid phase extraction (DMSPE) combined with ICP-MS for Cr speciation. 
      Fibrous g-C3N4@TiO2 nanocomposites (FGCTNCs) were used as a novel adsorbent for 
      DMSPE. RESULTS: The method detection limits were 110 pg/g (Cr(III)) and 260 pg/g 
      (Cr(VI)) for milk powder (0.1 g), and 5.1 pg/g (Cr(III)) and 13 pg/g (Cr(VI)) for 
      liquid cow milk (2 mL). The relative standard deviations (RSDs), obtained by 
      analyzing the standard solutions containing 1.0 ng/mL of the analytes in sequence 
      for nine times, were 4.3% and 5.1% for Cr(III) and Cr(VI), respectively. 
      Linearity was observed over the range of 4 magnitude orders with correlation 
      coefficients better than 0.9961. The enrichment factor of 100 was obtained. The 
      majority of Cr in the samples was transferred into digestion solution. The 
      content of Cr(III) is much higher than that of Cr(VI) in the digestion solution. 
      CONCLUSIONS: This method has the advantages of reduced solvent consumption, less 
      adsorbent dosage, and high extraction efficiency. It may become a valuable 
      strategy for elemental species in food samples. HIGHLIGHTS: The samples were 
      treated with artificial gastric juice to avoid the inter-conversion of species. 
      FGCTNCs exhibit the merits of N-rich functional groups and selective adsorption 
      for the analytes.
CI  - (c) AOAC INTERNATIONAL 2020. All rights reserved. For permissions, please email: 
      journals.permissions@oup.com.
FAU - Chen, Shizhong
AU  - Chen S
AD  - College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 
      430023, P.R. China.
FAU - Liu, Yuxiu
AU  - Liu Y
AD  - College of Chemical and Environmental Engineering, Wuhan Polytechnic University, 
      Wuhan 430023, P.R. China.
FAU - Yan, Juntao
AU  - Yan J
AD  - College of Chemical and Environmental Engineering, Wuhan Polytechnic University, 
      Wuhan 430023, P.R. China.
FAU - Wang, Chunlei
AU  - Wang C
AD  - College of Chemical and Environmental Engineering, Wuhan Polytechnic University, 
      Wuhan 430023, P.R. China.
FAU - Lu, Dengbo
AU  - Lu D
AD  - College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 
      430023, P.R. China.
LA  - eng
PT  - Journal Article
PL  - England
TA  - J AOAC Int
JT  - Journal of AOAC International
JID - 9215446
RN  - 0 (Nitrogen Compounds)
RN  - 0 (graphitic carbon nitride)
RN  - 0R0008Q3JB (Chromium)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - 7782-42-5 (Graphite)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Animals
MH  - *Chromium/analysis
MH  - Digestion
MH  - Gastric Juice/chemistry
MH  - Graphite
MH  - Humans
MH  - Milk/chemistry
MH  - *Nanocomposites
MH  - Nitrogen Compounds
MH  - Solid Phase Extraction
MH  - Titanium
EDAT- 2020/10/21 06:00
MHDA- 2021/06/29 06:00
CRDT- 2020/10/20 06:25
PHST- 2020/08/04 00:00 [received]
PHST- 2020/08/11 00:00 [revised]
PHST- 2020/08/11 00:00 [accepted]
PHST- 2020/10/21 06:00 [pubmed]
PHST- 2021/06/29 06:00 [medline]
PHST- 2020/10/20 06:25 [entrez]
AID - 5895297 [pii]
AID - 10.1093/jaoacint/qsaa118 [doi]
PST - ppublish
SO  - J AOAC Int. 2021 Mar 5;104(1):129-136. doi: 10.1093/jaoacint/qsaa118.