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第
43
卷第
11
期
2013
年
11
月
激光与红外
LASER & INFRARED
Vo
1.
43 ,No.11
November
,2013
文章编号:
1001-5078
(2013)
11-1212-05
·激光应用技术·
赣南脐橙中的铜的激光诱导击穿光谱检测分析
林永增,姚明印,涂建平,徐雪红,彭秋梅,陈添兵,刘木华
(江西农业大学生物光电及应用重点实验室,江西南昌
330045)
摘
要:为了验证激光诱导击穿光谱技术对农产品重金属元素检测的可行性,以实验室经硫酸
铜污染的赣南脐橙为研究对象,并以
CuI
324.
75
nm
为分析谱线,用波长为
1064
nm
的
Nd:YAG
激光器在实验室正常大气条件下,对脐橙样品做时间特性和能量特性影响的实验,通
过信背比的计算比较,得到最佳延迟时间为
1200
ns
,最佳的激光能量为
100
时,且相对标准偏
差为
10.329
毛。然后在这一实验参数下,对
6
个含不同
Cu
浓度的脐橙样品进行实验,建立
Cu
元素浓度与其特征光谱强度之间的定标曲线,线性拟合相关系数为
0.96
,通过定标曲线计算
得到
Cu
的检测限为
10.
81μglg
。由此表明:应用激光诱导击穿光谱技术检测赣南脐橙中的
重金属
Cu
是可行的,但检测限有待进一步降低。
关键词:激光诱导击穿光谱技术;赣南脐橙;参数优化;快速检测
中图分类号
:TN249
文献标识码
:A
DOI:
10.
3969/j.
issn.
1001-5078.2013.
1
1.
03
Analysis of Cu in Gannan navel orange by laser-induced
breakdown spectroscopy
LIN
Yong-zeng
,
YAO
Ming-yin
,
TU
Jian-ping
,
XU
Xue-hong
,
PENG
Qiu-mei
,
CHEN
Tian-bing
,
LIU
Mu-hua
( Optics-Electrics Application of Biomaterials Lab , Jiangxi Agricultural University , Nanchang 330045 ,China)
Abstract:ln
order
to
validate the practicability in detecting Cu in Gannan navel orange
by
laser induced breakdown
spectroscopy
,Gannan navel orange polluted
by
CuS0
4
was
set
as
experimental subject ,and CuI 324. 75nm
was
consid-
ered
as
the
spectralline
of analysis in the experiment, and the experiment of time characteristic and energy character-
istic
e
坠
ct
was
made on navel orange sample
by
Nd
:
YAG
1ωer(
1064nm) under the
nat
盯
al
atmosphere in lab.
Th
e
best delay time and laser pulse energy obtained from comparison of signal
to
background are
1.
2μs
and 100
m]
respec-
tively
,and the relative standard deviation is 10.
32
'3毛.咀
len
,
experiments were made on six navel oranges in different
concentration of Cu
, and the linear
re
gI回
sion
coefficient of calibration
cu
凹
e
established between concentration and
spectral intensity of Cu is
o.
96. And the limit of detection calculated
from
calibration
cu
凹
e
is 10.
81
1-l
glg.
It
is dem-
onstrated that application of laser induced breakdown
spectros
∞
py
in detecting heavy metal
Cu
of Gannan navel or-
ange is feasible
, but the limit of detection should be further reduced.
Key
words:
Laser-Induced Breakdown Spectroscopy; Gannan navel orange;
p
町
ameter
optimization; rapid detection
1
引言
江西赣南是脐橙种植的重要基地,
2010
年赣南
脐橙种植面积在全市达
160
万亩,产量突破
110
万
吨,销往国内外,给当地带来了巨大的经济价值。但
是,随着地区经济的迅猛发展,赣南地区的环境污染
问题越来越严重,水果重金属污染问题也受到广泛
关注。由于重金属不能降解,通过水果进人到人体
基金项目:国家自然科学基金项日
(No.
31271612)
;江西省教育
厅科技计划
(No.
C
刀
12294)
;江西省学术带头人计划项目
(No.
09004004)
资助。
作者简介:林永增
(1986
寸,男,硕士研究生,主要从事环境污染
光学无损检测方面的研究。
E-mail:
linyz.2011yz@yahoo.cn
收稿日期
:2013
-D
4-17
第
43
卷第
11
期
2013
年
11
月
激光与红外
LASER & INFRARED
Vo
1.
43 ,No.11
November
,2013
文章编号:
1001-5078
(2013)
11-1212-05
·激光应用技术·
赣南脐橙中的铜的激光诱导击穿光谱检测分析
林永增,姚明印,涂建平,徐雪红,彭秋梅,陈添兵,刘木华
(江西农业大学生物光电及应用重点实验室,江西南昌
330045)
摘
要:为了验证激光诱导击穿光谱技术对农产品重金属元素检测的可行性,以实验室经硫酸
铜污染的赣南脐橙为研究对象,并以
CuI
324.
75
nm
为分析谱线,用波长为
1064
nm
的
Nd:YAG
激光器在实验室正常大气条件下,对脐橙样品做时间特性和能量特性影响的实验,通
过信背比的计算比较,得到最佳延迟时间为
1200
ns
,最佳的激光能量为
100
时,且相对标准偏
差为
10.329
毛。然后在这一实验参数下,对
6
个含不同
Cu
浓度的脐橙样品进行实验,建立
Cu
元素浓度与其特征光谱强度之间的定标曲线,线性拟合相关系数为
0.96
,通过定标曲线计算
得到
Cu
的检测限为
10.
81μglg
。由此表明:应用激光诱导击穿光谱技术检测赣南脐橙中的
重金属
Cu
是可行的,但检测限有待进一步降低。
关键词:激光诱导击穿光谱技术;赣南脐橙;参数优化;快速检测
中图分类号
:TN249
文献标识码
:A
DOI:
10.
3969/j.
issn.
1001-5078.2013.
1
1.
03
Analysis of Cu in Gannan navel orange by laser-induced
breakdown spectroscopy
LIN
Yong-zeng
,
YAO
Ming-yin
,
TU
Jian-ping
,
XU
Xue-hong
,
PENG
Qiu-mei
,
CHEN
Tian-bing
,
LIU
Mu-hua
( Optics-Electrics Application of Biomaterials Lab , Jiangxi Agricultural University , Nanchang 330045 ,China)
Abstract:ln
order
to
validate the practicability in detecting Cu in Gannan navel orange
by
laser induced breakdown
spectroscopy
,Gannan navel orange polluted
by
CuS0
4
was
set
as
experimental subject ,and CuI 324. 75nm
was
consid-
ered
as
the
spectralline
of analysis in the experiment, and the experiment of time characteristic and energy character-
istic
e
坠
ct
was
made on navel orange sample
by
Nd
:
YAG
1ωer(
1064nm) under the
nat
盯
al
atmosphere in lab.
Th
e
best delay time and laser pulse energy obtained from comparison of signal
to
background are
1.
2μs
and 100
m]
respec-
tively
,and the relative standard deviation is 10.
32
'3毛.咀
len
,
experiments were made on six navel oranges in different
concentration of Cu
, and the linear
re
gI回
sion
coefficient of calibration
cu
凹
e
established between concentration and
spectral intensity of Cu is
o.
96. And the limit of detection calculated
from
calibration
cu
凹
e
is 10.
81
1-l
glg.
It
is dem-
onstrated that application of laser induced breakdown
spectros
∞
py
in detecting heavy metal
Cu
of Gannan navel or-
ange is feasible
, but the limit of detection should be further reduced.
Key
words:
Laser-Induced Breakdown Spectroscopy; Gannan navel orange;
p
町
ameter
optimization; rapid detection
1
引言
江西赣南是脐橙种植的重要基地,
2010
年赣南
脐橙种植面积在全市达
160
万亩,产量突破
110
万
吨,销往国内外,给当地带来了巨大的经济价值。但
是,随着地区经济的迅猛发展,赣南地区的环境污染
问题越来越严重,水果重金属污染问题也受到广泛
关注。由于重金属不能降解,通过水果进人到人体
基金项目:国家自然科学基金项日
(No.
31271612)
;江西省教育
厅科技计划
(No.
C
刀
12294)
;江西省学术带头人计划项目
(No.
09004004)
资助。
作者简介:林永增
(1986
寸,男,硕士研究生,主要从事环境污染
光学无损检测方面的研究。
E-mail:
linyz.2011yz@yahoo.cn
收稿日期
:2013
-D
4-17