A Study on Distribution and Chemical Speciation of Lead in Corn Seed Germination by Synchrotron Radiation X-ray Fluorescence and Absorption Near Edge Structure Spectrometry

doi:10.1016/S1872-2040(14)60774-X

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	A Study on Distribution and Chemical Speciation of Lead in Corn Seed Germination by Synchrotron Radiation X-ray Fluorescence and Absorption Near Edge Structure Spectrometry
	Sun Jian-Ling 4; Luo Li-Qiang
刊名	CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
	2014
卷号	42 期号:10 页码:1447-1452
关键词	Corn Lead Micro-distribution Chemical speciation Synchrotron radiation X-ray absorption near edge structure
ISSN号	0253-3820
DOI	10.1016/S1872-2040(14)60774-X
英文摘要	Synchrotron radiation X-ray fluorescence analysis technology (SRXRF) can effectively reduce the detection limit for the determination of heavy metal elements. The technique is especially suitable for in situ nondestructive analysis of biological samples with low contents. By corn seed germination test, and combining with SRXRF technique, the effects of Pb on corn seed germination and Pb micro-distribution in the corn seed were studied. X-ray absorption near edge structure (XANES) technique was also used to analyze the Pb chemical speciation in different parts of corn seed. The above experiments were carried out for understanding the absorption and transformation mechanism of Pb by corn seeds. The results showed that the germination rate, bud length and root length decreased with the increasing contents of Pb. The analysis of variance showed that P-value of the germination rate, bud length and root elongation of corn seeds which were exposed to different concentration of Pb were 2.0 x 10(-3), 1.4 x 10(-4) and 2.4 x 10(-8) respectively, suggesting there were highly significant differences during this three indicators and the content of Pb. In addition, the inhibition effect on root growth was greater. The results of SRXRF analysis showed that Pb was mainly enriched in episperm and embryo, which would inhibit embryonic develop into bud and root. Moreover, the results showed that all samples including root, shoot and the different part of seed had the same Pb-L-III (13035 eV) XANES spectra and Pb speciation. The linear combination fitting results indicated that the lead phosphate chloride and lead stearate accounted for 74.3% and 24.2% respectively, suggesting that the main Pb speciation in corn was lead phosphate chloride which deposited inside of corn, and a few combined with carboxylic to form organic lead.
学科主题	岩矿鉴定与测试
WOS关键词	ZEA-MAYS L. ; SESBANIA-DRUMMONDII ; CADMIUM ; LOCALIZATION ; ALLOCATION ; BIOMASS ; GROWTH ; PLANTS ; XANES ; PB
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000345116700005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40464]
专题	中国地质科学院国家地质实验测试中心
作者单位	1.[Sun Jian-Ling 2.Natl Res Ctr Geoanal, Beijing 100037, Peoples R China 3.Beijing Municipal Res Inst Environm Protect, Beijing 100037, Peoples R China 4.中国地质科学院国家地质实验测试中心
推荐引用方式 GB/T 7714	Sun Jian-Ling,Luo Li-Qiang. A Study on Distribution and Chemical Speciation of Lead in Corn Seed Germination by Synchrotron Radiation X-ray Fluorescence and Absorption Near Edge Structure Spectrometry[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2014,42(10):1447-1452.
APA	Sun Jian-Ling,&Luo Li-Qiang.(2014).A Study on Distribution and Chemical Speciation of Lead in Corn Seed Germination by Synchrotron Radiation X-ray Fluorescence and Absorption Near Edge Structure Spectrometry.CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,42(10),1447-1452.
MLA	Sun Jian-Ling,et al."A Study on Distribution and Chemical Speciation of Lead in Corn Seed Germination by Synchrotron Radiation X-ray Fluorescence and Absorption Near Edge Structure Spectrometry".CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 42.10(2014):1447-1452.