Performance of a simple UV LED light source in the capillary electrophoresis of inorganic anions with indirect detection using a chromate background electrolyte

The Analyst ◽  
2002 ◽  
Vol 127 (12) ◽  
pp. 1564-1567 ◽  
Author(s):  
Marion King ◽  
Brett Paull ◽  
Paul R. Haddad ◽  
Miroslav Macka
Keyword(s):  
Capillary Electrophoresis ◽  
Light Source ◽  
Background Electrolyte ◽  
Inorganic Anions ◽  
Indirect Detection ◽  
Led Light ◽  
Uv Led

scholarly journals Separation, Analysis and Validation of Metal Ions in Aqueous Samples Using Capillary Electrophoresis

2019 ◽  
pp. 1-9
Author(s):  
Aron Hailemichael ◽  
Andrew Martin Crouch ◽  
Arumugam Manohar ◽  
Medhanie Afewerki
Keyword(s):  
Capillary Electrophoresis ◽  
Metal Ions ◽  
Background Electrolyte ◽  
Inorganic Ions ◽  
Ionic Species ◽  
Indirect Detection ◽  
Complexing Agent ◽  
Aqueous Samples ◽  
Recent Past ◽  
Electrolyte Ph

Capillary  electrophoresis  (CE)  has been developed  as  one  of  the  powerful  separation  techniques  for  the analysis of inorganic and organic ions in complex matrices in the recent past. In aqueous samples, most of the inorganic ions are having weak absorption profiles in the UV-Vis region of the spectrum. These low absorption profile ionic species are commonly detected by indirect UV absorbance with the addition of an absorbing co-ion (chromophore) into the electrolyte. The inorganic cations oftenly require an additional complexing agent to selectively alter their similar mobilities and proper separation. The indirect detection at 214 nm was performed with α-hydroxyisobutyric acid (α-HIBA)-4-aminopyridine background electrolyte (BGE) that has a characteristic absorbance at 214 nm. The BGE was applied for the separation, analysis, and validation of metal ions in water samples. The metal ions such as K+, Na+, Ca2+, Mg2+, Mn2+, Fe2+, Cd2+, Pb2+, Ni2+ and Zn2+ were separated successfully in this study. Also, the effect of electrolyte pH, applied voltage and injection time for the separation of cations was investigated.

scholarly journals ‘All in one’ photo-reactor pod containing TiO2 coated glass beads and LEDs for continuous photocatalytic destruction of cyanotoxins in water

2020 ◽  
Vol 6 (4) ◽  
pp. 945-950 ◽  
Author(s):  
H. Q. Nimal Gunaratne ◽  
Carlos J. Pestana ◽  
Nathan Skillen ◽  
Jianing Hui ◽  
S. Saravanan ◽  
...  
Keyword(s):  
Light Source ◽  
Glass Beads ◽  
Clean Water ◽  
Led Light ◽  
Photo Catalyst ◽  
Coated Glass ◽  
Global Challenges ◽  
Uv Led ◽  
Photocatalytic Destruction

To tackle one of the Global Challenges of providing clean water, an ‘all in one’ photo reactor pod is designed carrying a supported benign photo-catalyst (TiO2) and an UV-LED light source which is utilised continuously to remove cyanotoxins in water.

scholarly journals Development of the calibration device using UAV mounted UV-LED light source for the fluorescence detector

2019 ◽  
Vol 210 ◽  
pp. 05015
Author(s):  
Takayuki Tomida ◽  
Taichi Inadomi ◽  
Terutsugu Seki ◽  
Yuichiro Tameda ◽  
Yuya Oku ◽  
...  
Keyword(s):  
Data Analysis ◽  
Light Source ◽  
Fluorescence Detector ◽  
Positioning Accuracy ◽  
Telescope Array ◽  
Led Light ◽  
Uv Led ◽  
The Status ◽  
Aerial Vehicle ◽  
Calibration Device

We have developed a standard UV-LED light source mounted on an unmanned aerial vehicle (UAV), so-called the Opt-copter, for the calibration of the fluorescence detectors (FDs) of the Telescope Array experiment. The positioning accuracy of the UAV controlled by GPS is ~ 10 cm, which enables a precision calibration of the pointing directions of the FD phototubes. We report the hardware details of the device and the status of data analysis.

Polymeric ionic liquid as a background electrolyte modifier enhancing the separation of inorganic anions by capillary electrophoresis

2011 ◽  
Vol 65 (3) ◽  
Author(s):  
Yabin Zhou ◽  
Jing Li ◽  
Haifeng Han ◽  
Xia Liu ◽  
Shengxiang Jiang
Keyword(s):  
Ionic Liquid ◽  
Capillary Electrophoresis ◽  
High Efficiency ◽  
Background Electrolyte ◽  
Inorganic Anions ◽  
Optimum Conditions ◽  
Easy Method ◽  
Polymeric Ionic Liquid ◽  
Buffer Composition ◽  
Excellent Reproducibility

AbstractA novel and easy method for the separation of inorganic anions by capillary electrophoresis using a polymeric ionic liquid (PIL), poly(1-vinyl-3-butylimidazolium bromide) as a background electrolyte modifier has been developed. The PIL has been proved to generate a reversed electroosmotic flow which reduces the analysis time and improves the separation significantly. Effects of the PIL concentration and buffer composition (pH and concentration) were evaluated on basis of the resolution and efficiency of the sample. Under optimum conditions, good separation of six model inorganic anions was achieved with high efficiency and excellent reproducibility within 3 min. The results obtained indicate that the combination of reversed EOF and the association between the analytes and the PIL on the capillary wall or BGE play a prominent role in the separation of anions. Therefore, the PIL presents a useful alternative for the BGE modifier in the study of inorganic anions by CE.

Single-molecule Imaging with an Inexpensive UV-LED Light Source

2009 ◽  
Vol 38 (3) ◽  
pp. 234-235 ◽  
Author(s):  
Akifumi Hattori ◽  
Satoshi Habuchi ◽  
Martin Vacha
Keyword(s):  
Light Source ◽  
Single Molecule ◽  
Single Molecule Imaging ◽  
Led Light ◽  
Uv Led

Photocatalytic degradation of agricultural antibiotics using a UV-LED light source

2013 ◽  
Vol 49 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Aramice Y.S. Malkhasian ◽  
Maryam Izadifard ◽  
Gopal Achari ◽  
Cooper H. Langford
Keyword(s):  
Photocatalytic Degradation ◽  
Light Source ◽  
Led Light ◽  
Uv Led

scholarly journals Design of a Secondary Freeform Lens of UV LED Mosquito-Trapping Lamp for Enhancing Trapping Efficiency

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 335 ◽  
Author(s):  
Wei-Hsiung Tseng ◽  
Diana Juan ◽  
Wei-Cheng Hsiao ◽  
Cheng-Han Chan ◽  
Hsin-Yi Ma ◽  
...  
Keyword(s):  
Light Intensity ◽  
Intensity Distribution ◽  
Light Emitting Diode ◽  
Trapping Efficiency ◽  
Axially Symmetric ◽  
Light Intensity Distribution ◽  
Light Emitting ◽  
Led Light ◽  
Uv Led ◽  
Freeform Lens

In this study, our proposed ultraviolet light-emitting diode (UV LED) mosquito-trapping lamp is designed to control diseases brought by insects such as mosquitoes. In order to enable the device to efficiently catch mosquitoes in a wider area, a secondary freeform lens (SFL) is designed for UV LED. The lens is mounted on a 3 W UV LED light bar as a mosquito-trapping lamp of the new UV LED light bar module to achieve axially symmetric light intensity distribution. The special SFL is used to enhance the trapping capabilities of the mosquito-trapping lamp. The results show that when the secondary freeform surface lens is applied to the experimental outdoor UV LED mosquito-trapping lamp, the trapping range can be expanded to 100π·m2 and the captured mosquitoes increased by about 300%.

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