PMID- 36220294
OWN - NLM
STAT- MEDLINE
DCOM- 20221013
LR  - 20221013
IS  - 1873-4324 (Electronic)
IS  - 0003-2670 (Linking)
VI  - 1231
DP  - 2022 Oct 23
TI  - Portable and miniature mercury analyzer using direct sampling inbuilt-metal 
      ceramic electrothermal vaporization.
PG  - 340444
LID - S0003-2670(22)01015-7 [pii]
LID - 10.1016/j.aca.2022.340444 [doi]
AB  - In this work, a small-size inbuilt-metal ceramic heater (IMCH) was for the first 
      time utilized as a solid sampling electrothermal vaporizer (ETV), and then a 
      novel direct sampling mercury analyzer coupled with a miniature atomic absorption 
      spectrometer was thereby fabricated for sensitive determination of mercury in 
      soil. The mercury analyzer is mainly composed of an IMCH-ETV, a catalytic 
      pyrolysis furnace (CPF) using Al(2)O(3) particles as a new filler, an atomic 
      absorption spectrometer (AAS) and a miniature air pump for carrier gas; herein, 
      the mostly used gold amalgamation was canceled. The IMCH with 30 W heating 
      fulfills the 100% vaporization of mercury from up to 80 mg soil samples using 
      0.1 L min(-1) air carrier. Under the optimized conditions, the method detection 
      limit (LOD) was 0.4 ng g(-1) for a 50 mg sample and the RSD of 11 repeated 
      measurements of GSS-3a soil certified reference material (CRM) was 4%. 
      Furthermore, the measured Hg values in various soil CRMs and real soil samples 
      were within their certified values and consistent with that using the Chinese 
      standard method (solid sampling catalytic pyrolysis AAS with gold amalgamation); 
      and the recoveries were 85-113%, which proved favorable analytical accuracy and 
      precision. This fabricated instrumentation only occupies 5 kg and 200 W power 
      consumption vs. more than 25 kg and 1000 W for the traditional Hg analyzer. 
      Therefore, the proposed IMCH-ETV-AAS method is very suitable for portable and 
      rapid detection of mercury in soil.
CI  - Copyright (c) 2022 Elsevier B.V. All rights reserved.
FAU - Lv, Zhaohui
AU  - Lv Z
AD  - Institute of Quality Standard and Testing Technology for Agro-products, Chinese 
      Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and 
      Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
FAU - Liu, Jixin
AU  - Liu J
AD  - Institute of Quality Standard and Testing Technology for Agro-products, Chinese 
      Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and 
      Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China; 
      Beijing Ability Technology Company, Limited, Beijing, 100081, China. Electronic 
      address: ljx2117@gmail.com.
FAU - Mao, Xuefei
AU  - Mao X
AD  - Institute of Quality Standard and Testing Technology for Agro-products, Chinese 
      Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and 
      Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China. 
      Electronic address: mxf08@163.com.
FAU - Na, Xing
AU  - Na X
AD  - Beijing Ability Technology Company, Limited, Beijing, 100081, China.
FAU - Qian, Yongzhong
AU  - Qian Y
AD  - Institute of Quality Standard and Testing Technology for Agro-products, Chinese 
      Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and 
      Quality, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
LA  - eng
PT  - Journal Article
DEP - 20220927
PL  - Netherlands
TA  - Anal Chim Acta
JT  - Analytica chimica acta
JID - 0370534
RN  - 0 (Soil)
RN  - 7440-57-5 (Gold)
RN  - FXS1BY2PGL (Mercury)
SB  - IM
MH  - Ceramics
MH  - Gold
MH  - *Mercury/analysis
MH  - Soil
MH  - Spectrophotometry, Atomic/methods
MH  - Volatilization
OTO - NOTNLM
OT  - Electrothermal vaporization (ETV)
OT  - Inbuilt-metal ceramic heater (IMCH)
OT  - Mercury
OT  - Soil
OT  - Solid sampling
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- 2022/10/12 06:00
MHDA- 2022/10/14 06:00
CRDT- 2022/10/11 21:04
PHST- 2022/07/15 00:00 [received]
PHST- 2022/09/15 00:00 [revised]
PHST- 2022/09/22 00:00 [accepted]
PHST- 2022/10/11 21:04 [entrez]
PHST- 2022/10/12 06:00 [pubmed]
PHST- 2022/10/14 06:00 [medline]
AID - S0003-2670(22)01015-7 [pii]
AID - 10.1016/j.aca.2022.340444 [doi]
PST - ppublish
SO  - Anal Chim Acta. 2022 Oct 23;1231:340444. doi: 10.1016/j.aca.2022.340444. Epub 
      2022 Sep 27.