Application of LEFC-2006 in Thallium Monitoring of Water Quality

Hai-lan LIN; Zhong-ting HUANG; Yang CHEN; Tao YU; Yun-bo YANG; Jun-ping BI; Pei LIU

doi:10.3964/j.issn.1000-0593(2022)11-3642-05

Spectroscopy and Spectral Analysis, Volume. 42, Issue 11, 3642(2022)

Application of LEFC-2006 in Thallium Monitoring of Water Quality

Hai-lan LIN^1、*, Zhong-ting HUANG^{1、1; *;}, Yang CHEN^2、2;, Tao YU^1、1;, Yun-bo YANG^2、2;, Jun-ping BI^1、1;, and Pei LIU^1、1;

Author Affiliations

¹1. Hunan Province Environmental Monitoring Center, State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants, Changsha 410019, China

²2. Lihe Technology (Hunan) Co., Ltd., Changsha 410205, China

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Figures & Tables(7)

Fig. 1. The basic structure diagram of instrument

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Table 1. Results of test for detection limits (μg·L^-1)
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Table 1. Results of test for detection limits (μg·L^-1)
1 2 3 4 5 6 7 平均值 SD 方法检出限方法测定下限
测定值 0.052 0.053 0.048 0.046 0.044 0.046 0.049 0.048 0.003 0.02 0.08

Table 2. Accuracy results of thallium (μg·L^-1)

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Table 2. Accuracy results of thallium (μg·L^-1)

平行号	标液1	标液2	标液3
1	0.097	0.995	5.24
2	0.096	0.993	5.13
3	0.096	1.01	5.07
4	0.096	0.983	5.24
5	0.093	0.996	5.20
6	0.089	1.01	5.10
平均值	0.095	1.00	5.14
有证标准物质浓度	0.10	1.00	5.00
相对误差/%	-5.5	-0.17	2.9

Table 3. Precision results of thallium in actual samples (μg·L^-1)

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Table 3. Precision results of thallium in actual samples (μg·L^-1)

	地表水1	地表水2	地表水3	废水 1	废水 2	废水 3	废水 4
1	0.26	0.061	0.035	136	21.0	19.4	1.38
2	0.24	0.065	0.032	134	21.1	18.7	1.41
3	0.22	0.064	0.032	134	22.2	18.7	1.40
4	0.26	0.061	0.032	135	20.5	18.4	1.42
5	0.24	0.064	0.033	134	20.6	18.4	1.47
6	0.25	0.062	0.036	136	20.8	20.7	1.46
平均值	0.25	0.063	0.033	135	21.0	19.1	1.42
SD	0.015	0.001 7	0.001 8	0.80	0.64	0.88	0.035
RSD/%	6.2	2.7	5.3	0.60	3.0	4.6	2.5

Table 4. Recoveries of thallium in actual samples (n=6)

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Table 4. Recoveries of thallium in actual samples (n=6)

水质类别	点位名称	测试结果
地表水	3	原液测试值/(μg·L^-1)	0.033
		加标测试值/(μg·L^-1)	0.070	0.119
		加标量/(μg·L^-1)	0.030	0.080
		加标回收率/%	123	108
地表水	4	原液测试值/(μg·L^-1)	0.063
		加标测试值/(μg·L^-1)	0.139	0.144
		加标量/(μg·L^-1)	0.06	0.08
		加标回收率/%	127	101
废水	4	测试值/(μg·L^-1)	1.42
		加标测试值/(μg·L^-1)	2.97
		加标量/(μg·L^-1)	1.50
		加标回收率/%	103

Table 5. Comparison and analysis of precision data between LFEC-2006(Tl) and ICP-MS (n=6)

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Table 5. Comparison and analysis of precision data between LFEC-2006(Tl) and ICP-MS (n=6)

水质类型	样品点位	测试值	ICP-MS 法	LFEC-2006 (Tl)	两个方法相对偏差
地表水	1	平均值	0.218	0.245	5.8
		SD	0.016	0.015	/
		RSD/%	7.5	6.2	/
	2	平均值	0.034	0.063	30
		SD	0.000 6	0.001 7	/
		RSD/%	1.9	2.7	/
	3	平均值	0.028	0.033	8.7
		SD	0.000 0	0.001 8	/
		RSD/%	0.00	5.3	/
废水	1	平均值	122	135	4.8
		SD	0.99	0.80	/
		RSD/%	0.81	0.60	/
	2	平均值	18.9	21.0	5.3
		SD	0.24	0.64	/
		RSD/%	1.3	3.0	/
	3	平均值	18.7	19.1	0.85
		SD	0.33	0.88	/
		RSD/%	1.8	4.6	/
	4	平均值	1.27	1.42	5.6
		SD	0.024	0.035	/
		RSD/%	1.9	2.5	/

Table 6. Comparative data of thallium automatic analyzer and ICP-MS (μg·L^-1)

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Table 6. Comparative data of thallium automatic analyzer and ICP-MS (μg·L^-1)

序号	样品编号	ICP-MS 法	LFEC-2006 (Tl)	相对误差/%
1	20210418-3#-8	0.06	<0.02	/
2	20210418-3#-9	0.07	<0.02	/
3	20210418-3#-10	0.06	<0.02	/
4	20210418-3#-11	0.06	<0.02	/
5	20210418-1#-8	0.88	0.795	-9.7
6	20210418-1#-9	0.82	0.799	-2.6
7	20210418-1#-10	1.09	1.18	8.0
8	20210418-1#-11	1.25	1.18	-5.6
9	20210418-17#-9	0.07	<0.02	/
10	20210820-1#-8	0.034	0.030	-12
11	20210820-1#-9	0.038	0.030	-21
12	20210820-2#-8	0.065	0.084	29
14	20210820-2#-9	0.068	0.076	12
15	20210820-3#-8	0.054	0.062	15
16	20210820-3#-9	0.055	0.058	5.5
17	20210820-4#-8	0.578	0.582	0.69
18	20210820-4#-9	0.562	0.535	-4.8
19	20210820-5#-8	2.05	2.22	8.3
20	20210820-5#-9	1.98	2.04	3.0

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Hai-lan LIN, Zhong-ting HUANG, Yang CHEN, Tao YU, Yun-bo YANG, Jun-ping BI, Pei LIU. Application of LEFC-2006 in Thallium Monitoring of Water Quality[J]. Spectroscopy and Spectral Analysis, 2022, 42(11): 3642

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