DNAzyme-based microarray for highly sensitive determination of metal ions

2009 ◽  
Vol 25 (4) ◽  
pp. 935-939 ◽  
Author(s):  
Peng Zuo ◽  
Bin-Cheng Yin ◽  
Bang-Ce Ye
Keyword(s):  
Metal Ions ◽  
Highly Sensitive ◽  
Sensitive Determination

scholarly journals Hairy Fluorescent Nanospheres Based on Polyelectrolyte Brush for Highly Sensitive Determination of Cu(II)

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 577 ◽  
Author(s):  
Qiaoling Wang ◽  
Kaimin Chen ◽  
Yi Qu ◽  
Kai Li ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Coupling Method ◽  
Carboxyl Groups ◽  
Particle Sizes ◽  
Carboxyl Content ◽  
High Brightness ◽  
Highly Sensitive ◽  
Sensitive Determination ◽  
Content Range

Currently, it is an ongoing challenge to develop fluorescent nanosphere detectors that are uniform, non-toxic, stable and bearing a large number of functional groups on the surface for further applications in a variety of fields. Here, we have synthesized hairy nanospheres (HNs) with different particle sizes and a content range of carboxyl groups from 4 mmol/g to 9 mmol/g. Based on this, hairy fluorescent nanospheres (HFNs) were prepared by the traditional coupling method (TCM) or adsorption-induced coupling method (ACM). By comparison, it was found that high brightness HFNs are fabricated based on HNs with poly (acrylic acid) brushes on the surface via ACM. The fluorescence intensity of hairy fluorescent nanospheres could be controlled by tuning the content of 5-aminofluorescein (5-AF) or the carboxyl groups of HNs easily. The carboxyl content of the HFNs could be as high as 8 mmol/g for further applications. The obtained HFNs are used for the detection of heavy metal ions in environmental pollution. Among various other metal ions, the response to Cu (II) is more obvious. We demonstrated that HFNs can serve as a selective probe and for the separation and determination of Cu(II) ions with a linear range of 0–0.5 μM and a low detection limit of 64 nM.

Cross Double Point Discharge as Enhanced Excitation Source for Highly Sensitive Determination of Arsenic, Mercury and Lead by Optical Emission Spectrometry

2021 ◽  
Author(s):  
Lin He ◽  
Peixia Li ◽  
Kai Li ◽  
Tao Lin ◽  
Jin Luo ◽  
...  
Keyword(s):  
Double Point ◽  
Hydride Generation ◽  
Optical Emission ◽  
Sample Introduction ◽  
Excitation Source ◽  
Emission Spectrometry ◽  
Highly Sensitive ◽  
Point Discharge ◽  
Sensitive Determination

A new cross double point discharge (CrossPD) microplasma was designed as an excitation source to construct a miniaturized optical emission spectrometer with hydride generation (HG) for sample introduction. The CrossPD...

Aunano/Fe-MOF hybrid electrode for highly sensitive determination of trace As(III)

2021 ◽  
pp. 115642
Author(s):  
Xiaoyuan Zhu ◽  
Guodong Zhu ◽  
Yuanxin Ge ◽  
Boshuang Zhang ◽  
Jianmao Yang ◽  
...  
Keyword(s):  
Highly Sensitive ◽  
Sensitive Determination

Highly sensitive determination of the methylated p16 gene in cancer patients by microchip electrophoresis

2005 ◽  
Vol 816 (1-2) ◽  
pp. 145-151 ◽  
Author(s):  
Xiao-Mian Zhou ◽  
Shu-Juan Shao ◽  
Guan-Dong Xu ◽  
Run-Tao Zhong ◽  
Da-Yu Liu ◽  
...  
Keyword(s):  
Cancer Patients ◽  
Microchip Electrophoresis ◽  
P16 Gene ◽  
Highly Sensitive ◽  
Sensitive Determination

Highly sensitive detection of copper(i) and copper(ii) in cell specimens by CE-UV with large-volume sample stacking

2016 ◽  
Vol 8 (21) ◽  
pp. 4272-4276 ◽  
Author(s):  
Cheng Chen ◽  
Xin Li ◽  
Xia Xie ◽  
Fengxia Chang ◽  
Meixian Li ◽  
...  
Keyword(s):  
Large Volume ◽  
Sensitive Detection ◽  
Sample Stacking ◽  
Highly Sensitive ◽  
Simultaneous Separation ◽  
Sensitive Determination ◽  
Highly Sensitive Detection ◽  
Determination Of Copper ◽  
Large Volume Sample Stacking

A CE-UV method has been developed for the simultaneous separation and sensitive determination of copper(i) and copper(ii) in cell specimens.

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