环境水中210Pb、210Po快速联测方法及应用

覃连敬; 李美丽; 覃浩

doi:10.7524/j.issn.0254-6108.2016.05.2015112407

环境化学

环境水中210Pb、210Po快速联测方法及应用

, ,

覃连敬, 李美丽, 覃浩. 环境水中210Pb、210Po快速联测方法及应用[J]. 环境化学, 2016, 35(5): 948-955. doi: 10.7524/j.issn.0254-6108.2016.05.2015112407

引用本文:

覃连敬, 李美丽, 覃浩. 环境水中210Pb、210Po快速联测方法及应用[J]. 环境化学, 2016, 35(5): 948-955. doi: 10.7524/j.issn.0254-6108.2016.05.2015112407

QIN Lianjing, LI Meili, QIN Hao. A combined method for the determination of 210Pb and 210Po in environmental water samples[J]. Environmental Chemistry, 2016, 35(5): 948-955. doi: 10.7524/j.issn.0254-6108.2016.05.2015112407

Citation:

QIN Lianjing, LI Meili, QIN Hao. A combined method for the determination of 210Pb and 210Po in environmental water samples[J]. Environmental Chemistry, 2016, 35(5): 948-955. doi: 10.7524/j.issn.0254-6108.2016.05.2015112407

环境水中210Pb、210Po快速联测方法及应用

1.
广东省环境辐射监测中心, 广州, 510305

A combined method for the determination of 210Pb and 210Po in environmental water samples

1.
Guangdong provincial environmental radiation monitoring center, Guangzhou, 510305, China

摘要: 本文对210Pb、210Po快速联测方法作了深入研究,确定了适用于环境水样中210Pb、210Po联测的最优实验条件.在未经萃取分离情况下,以坑坏血酸+盐酸羟胺混合体系作还原剂,当盐酸浓度为0.5 mol·L-1,沉积时间为2 h,沉积温度为90℃,溶液体积为50 mL时,210Bi、210Po可同时自发沉积在铜片上.利用在同一衰变链上活度最终平衡的特点,通过测量210Bi计数计算得到水中210Pb的活度,然后通过209Po示踪α能谱法求得水中210Po的活度.方法精密度优于10%,加标回收率在95.3%-107.6%,210Pb、210Po探测限分别达到1.2 mBq·L-1和0.15 mBq·L-1.利用该联测方法对粤北矿山地区环境水样进行了分析,结果表明,饮用水中210Pb、210Po活度浓度范围分别为(2.4-38.7) mBq·L-1和(1.0-4.1) mBq·L-1;河溪水中210Pb、210Po活度浓度范围分别为(4.3-181.5) mBq·L-1和(0.7-23.3) mBq·L-1.
- ²¹⁰Pb /
- ²¹⁰Po /
- 联测 /
- 环境水 /
- 铀矿山
Abstract: The optimum measurement conditions were investigated and it was found that 210Bi and 210Po were deposited on copper sheet simultaneously and spontaneously under the conditions of 0.5 mol·L-1 HCl at 90℃ for 2 hours, with ascorbic acid and hydroxylamine hydrochloride mixed system as reducing agents, in a total of 50 mL solution without extraction separation. By using 210Bi and 210Po equilibrium in radioactive decay chain, the activity of 210Pb was measured based on β counting of 210Bi, and then the activity of 210Po was determined by alpha spectrometry with 209Po as a yield-tracing isotope. The relative deviation of duplicate analysis was less than 10% with the recovery of standard addition between 95.3% and 107.6% for the two nuclides, and the detection limits were 1.2 mBq·L-1 and 0.15 mBq·L-1 for 210Pb and 210Po, respectively. The method was used for the measurement of 210Pb and 210Po in the environmental water samples from uranium mining area of northern Guangdong Province, China. The results showed that the activities of 210Pb and 210Po in drinking water were (2.4-38.7) mBq·L-1 and (1.0-4.1) mBq·L-1, respectively, and that in river water were (4.3-181.5) mBq·L-1 and (0.7-23.3) mBq·L-1, respectively.
- ²¹⁰Pb /
- ²¹⁰Po /
- combined determination method /
- environmental water sample /
- uranium mining area

[1]	陈秀云,翁德通,杨孝桐.福建食品和水中²¹⁰Pb与²¹⁰Po放射性含量及其所致居民内照射剂量估算[J].中国辐射卫生,1996,5(4):214-215. CHEN X Y,WENG D T,YANG X T. Investigation of ²¹⁰Po,²¹⁰Pb in foods and waters in Fujian and evaluation of internal dose to residents[J]. Chinese Journal of Radiological health,1996,5(4):214-215(in Chinese).
[2]	朱昌寿,刘玉兰,徐宁.中国食品和水中天然放射性核素水平及其对居民所致内照射剂量估算[M].北京:原子能出版社出版.1991. ZHU S C,LIU Y L,XU N. Investigation of natural radionuclides in foods and waters in China and evaluation of internal dose to public[M].BeiJing: Atomic Energy Press,1991(in Chinese).
[3]	廖运璇,张露,滕柯延,等.环境介质中²¹⁰Po的分析测定[J].铀矿冶,2013,(4):221-224. LIAO Y X,ZHANG L,TENG K Y,et al. Determination of ^{210 Po in environmental materials[J].Urnium Mining and Metallurgy,2013,(4):221-224(in Chinese).}
[4]	王玉学,郭冬发,王哲,等.²¹⁰Pb、²¹⁰Bi和²¹⁰Po测试技术研究进展与现状[J].铀矿冶,2014,(4):242-251. WANG Y X,GUO D F,WANG Z,et al. Research progress and status of measuring techniques of^{210 Po,²¹⁰Bi,²¹⁰Pb[J]. Uranium Geology, 2014,(4):242-251(in Chinese).}
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[8]	黄展常,吴其反,唐志辉,等.环境水中²¹⁰Pb核素放射性活度的快速分析方法[J].核技术,2013,36(7): 49-56. HUANG Z C,WU Q F,TANG Z H,et al. A method for rapid determination of ²¹⁰Pb radioactivity in environmental water[J]. Nuclear Techniques,2013,36(7):49-56(in Chinese).
[9]	王玉学,郭冬发,王哲,等. 铜箔恒温自沉积总α、总β计数法快速联测岩石、土壤及沉积物样品中的²¹⁰Pb、²¹⁰Bi、²¹⁰Po[J].铀矿地质,2013,29(3):179-192. WANG Y X,GUO D F,WANG Z,et al. The conjoint and rapid determination of ²¹⁰Pb,²¹⁰Bi,²¹⁰Po in rock and soil samples with gross α and β counter spontaneously deposited on Cu foil under constant temperature[J].Uranium Geology,2013,29(3):179-192(in Chinese).
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覃连敬, 李美丽, 覃浩. 环境水中210Pb、210Po快速联测方法及应用[J]. 环境化学, 2016, 35(5): 948-955. doi: 10.7524/j.issn.0254-6108.2016.05.2015112407

引用本文:

覃连敬, 李美丽, 覃浩. 环境水中210Pb、210Po快速联测方法及应用[J]. 环境化学, 2016, 35(5): 948-955. doi: 10.7524/j.issn.0254-6108.2016.05.2015112407

Citation:

环境水中210Pb、210Po快速联测方法及应用

1. 广东省环境辐射监测中心, 广州, 510305

收稿日期: 2015-11-24

关键词:

²¹⁰Pb /
²¹⁰Po /
联测 /
环境水 /
铀矿山

摘要: 本文对210Pb、210Po快速联测方法作了深入研究,确定了适用于环境水样中210Pb、210Po联测的最优实验条件.在未经萃取分离情况下,以坑坏血酸+盐酸羟胺混合体系作还原剂,当盐酸浓度为0.5 mol·L-1,沉积时间为2 h,沉积温度为90℃,溶液体积为50 mL时,210Bi、210Po可同时自发沉积在铜片上.利用在同一衰变链上活度最终平衡的特点,通过测量210Bi计数计算得到水中210Pb的活度,然后通过209Po示踪α能谱法求得水中210Po的活度.方法精密度优于10%,加标回收率在95.3%-107.6%,210Pb、210Po探测限分别达到1.2 mBq·L-1和0.15 mBq·L-1.利用该联测方法对粤北矿山地区环境水样进行了分析,结果表明,饮用水中210Pb、210Po活度浓度范围分别为(2.4-38.7) mBq·L-1和(1.0-4.1) mBq·L-1;河溪水中210Pb、210Po活度浓度范围分别为(4.3-181.5) mBq·L-1和(0.7-23.3) mBq·L-1.

English Abstract

A combined method for the determination of 210Pb and 210Po in environmental water samples

1. Guangdong provincial environmental radiation monitoring center, Guangzhou, 510305, China

Received Date: 2015-11-24

Keywords:

Abstract: The optimum measurement conditions were investigated and it was found that 210Bi and 210Po were deposited on copper sheet simultaneously and spontaneously under the conditions of 0.5 mol·L-1 HCl at 90℃ for 2 hours, with ascorbic acid and hydroxylamine hydrochloride mixed system as reducing agents, in a total of 50 mL solution without extraction separation. By using 210Bi and 210Po equilibrium in radioactive decay chain, the activity of 210Pb was measured based on β counting of 210Bi, and then the activity of 210Po was determined by alpha spectrometry with 209Po as a yield-tracing isotope. The relative deviation of duplicate analysis was less than 10% with the recovery of standard addition between 95.3% and 107.6% for the two nuclides, and the detection limits were 1.2 mBq·L-1 and 0.15 mBq·L-1 for 210Pb and 210Po, respectively. The method was used for the measurement of 210Pb and 210Po in the environmental water samples from uranium mining area of northern Guangdong Province, China. The results showed that the activities of 210Pb and 210Po in drinking water were (2.4-38.7) mBq·L-1 and (1.0-4.1) mBq·L-1, respectively, and that in river water were (4.3-181.5) mBq·L-1 and (0.7-23.3) mBq·L-1, respectively.

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环境水中210Pb、210Po快速联测方法及应用

A combined method for the determination of 210Pb and 210Po in environmental water samples

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环境水中210Pb、210Po快速联测方法及应用

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A combined method for the determination of 210Pb and 210Po in environmental water samples

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