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题名:
Refinement of Methodology for Cadmium Determination in Soil Micro-Arthropod Tissues
作者: Zhu Dong1,2; Ke Xin3; Wu Longhua1; Huang Yujuan1; Peter Christie1; Luo Yongming4
刊名: PEDOSPHERE
ISSN号: 1002-0160
出版日期: 2017-06-01
卷号: 27, 期号:3, 页码:491-501
关键词: digestion ; defecation ; Folsomia candida ; micro-samples ; predatory mite ; sample pre-treatment ; ultrasonic cleaning
DOI: 10.1016/S1002-0160(17)60345-X
英文摘要: Highly precise and reliable determination of heavy metals in soil micro-arthropod tissues remains a challenge because of the small size of the animals and their typical low abundance in metal-contaminated agricultural soils. The present study sought to develop a method for cadmium (Cd) determination in soil micro-arthropods by optimizing the sample digestion procedure, reducing sample weight, modifying sample pre-treatment and validating the methodology with field samples. The optimized digestion conditions comprised a sample mass of 50-150 mu g, digestion reagent of nitric acid:hydrogen peroxide (3:1), digestion temperature of 105 degrees C, digestion period of 3 h and digestion volume of 30 mu L. Defecation of the standatd Collembola Folsomia candida (92 h) and the indigenous Collembola Onychiurus yodai (42 h) and ultrasonic cleaning of F. candida increased the accuracy of Cd determination. The recovery of Cd using the refined procedure was 98.9% and the limits of detection and quantification were 0.002 and 0.008 mu g L-1, respectively. The within-batch precision values were < 3%. The Cd concentrations in the tissues of the Collembola Isotoma sp. collected from a range of metal-contaminated fields determined by the improved method were consistent with the Cd concentrations in the field soils. The results indicate that the optimized method can be used for more accurate or reliable determination of Cd concentrations in soil micro-arthropod tissues.
研究领域[WOS]: Agriculture
项目资助者: National High Technology Research and Development Program of China(2012AA101402-2) ; National Natural Science Foundation of China(41271264 ; 41325003)
关键词[WOS]: ORTHOGONAL ARRAY DESIGN ; ATOMIC-ABSORPTION SPECTROPHOTOMETRY ; ULTRASONIC ACID DIGESTION ; FOLSOMIA-CANDIDA ; BIOLOGICAL SAMPLES ; HEAVY-METALS ; MICROWAVE DIGESTION ; NATURAL SOILS ; COLLEMBOLA ; INVERTEBRATES
文章类型: Article
收录类别: SCI
语种: 英语
WOS记录号: WOS:000405059600010
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.yic.ac.cn/handle/133337/22553
Appears in Collections:中科院海岸带环境过程与生态修复重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Plant Physiol & Ecol, Shanghai 200032, Peoples R China
4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China

Recommended Citation:
Zhu Dong,Ke Xin,Wu Longhua,et al. Refinement of Methodology for Cadmium Determination in Soil Micro-Arthropod Tissues[J]. PEDOSPHERE,2017,27(3):491-501.
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