CE Analysis of Trace Level Biological Sample Using Online Sample Preconcentration Method

2015 ◽  
Vol 59 (2) ◽  
pp. 91-93
Author(s):  
Takayuki Kawai
Keyword(s):  
Biological Sample ◽  
Trace Level ◽  
Sample Preconcentration ◽  
Preconcentration Method

A simple separation/preconcentration method for the determination of aluminum in drinking water and biological sample

Desalination ◽  
2011 ◽  
Vol 281 ◽  
pp. 215-220 ◽  
Author(s):  
Sumaira Khan ◽  
Tasneem G. Kazi ◽  
Nida F. Kolachi ◽  
Jameel A. Baig ◽  
Hassan I. Afridi ◽  
...  
Keyword(s):  
Drinking Water ◽  
Biological Sample ◽  
Preconcentration Method

Scanning tunneling microscopy of E. coli RNA polymerase deposited onto an Au substrate by an electrochemical process

1991 ◽  
Vol 49 ◽  
pp. 378-379
Author(s):  
Rebecca W. Keller ◽  
Carlos Bustamante ◽  
David Bear
Keyword(s):  
Scanning Tunneling Microscope ◽  
Biological Sample ◽  
Substrate Surface ◽  
Electrochemical Process ◽  
Atomic Resolution ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Tunneling Microscope ◽  
E Coli ◽  
Preparation Techniques

Under ideal conditions, the Scanning Tunneling Microscope (STM) can create atomic resolution images of different kinds of samples. The STM can also be operated in a variety of non-vacuum environments. Because of its potentially high resolution and flexibility of operation, it is now being applied to image biological systems. Several groups have communicated the imaging of double and single stranded DNA.However, reproducibility is still the main problem with most STM results on biological samples. One source of irreproducibility is unreliable sample preparation techniques. Traditional deposition methods used in electron microscopy, such as glow discharge and spreading techniques, do not appear to work with STM. It seems that these techniques do not fix the biological sample strongly enough to the substrate surface. There is now evidence that there are strong forces between the STM tip and the sample and, unless the sample is strongly bound to the surface, it can be swept aside by the tip.

Analysis of Trace Level Perchlorate in Drinking Water and Ground Water by Electrospray Mass Spectrometry

1998 ◽  
Author(s):  
Rebecca A. Clewell ◽  
Wayne T. Brashear ◽  
David T. Tsui ◽  
Sanwat Chaudhuri ◽  
Rachel S. Cassady
Keyword(s):  
Mass Spectrometry ◽  
Drinking Water ◽  
Ground Water ◽  
Electrospray Mass Spectrometry ◽  
Trace Level

Anatase porous titania nanosheets for resonant-gravimetric detection of ppb-level NO2 at room-temperature

The Analyst ◽  
2021 ◽  
Author(s):  
Jialin Yang ◽  
Ding Wang ◽  
Ming Li ◽  
Haitao Yu ◽  
Pengcheng Xu ◽  
...  
Keyword(s):  
Public Health ◽  
Environmental Protection ◽  
Room Temperature ◽  
Trace Level ◽  
Porous Titania

The trace-level detection to harmful NO2 gas at room-temperature is very important for environmental protection and public health. This paper reports the resonant-gravimetric detection of ppb-level NO2 at room-temperature using...

Mercury speciation at trace level using fluorescein hydrazide as fluorescent probe

2021 ◽  
Author(s):  
Kempahanumakkagaari Sureshkumar ◽  
Thippeswamy Ramakrishnappa ◽  
Malingappa Pandurangappa
Keyword(s):  
Fluorescent Probe ◽  
Mercury Speciation ◽  
Trace Level

scholarly journals Recent Advances in Microfluidic Devices for Contamination Detection and Quality Inspection of Milk

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 558
Author(s):  
Hwee-Yeong Ng ◽  
Wen-Chin Lee ◽  
Chia-Te Kung ◽  
Lung-Chih Li ◽  
Chien-Te Lee ◽  
...  
Keyword(s):  
Foodborne Pathogens ◽  
Human Life ◽  
Microfluidic Devices ◽  
Quality Inspection ◽  
Milk Samples ◽  
Sample Preconcentration ◽  
Sample Extraction ◽  
Microfluidic Analysis ◽  
Sample Separation

Milk is a necessity for human life. However, it is susceptible to contamination and adulteration. Microfluidic analysis devices have attracted significant attention for the high-throughput quality inspection and contaminant analysis of milk samples in recent years. This review describes the major proposals presented in the literature for the pretreatment, contaminant detection, and quality inspection of milk samples using microfluidic lab-on-a-chip and lab-on-paper platforms in the past five years. The review focuses on the sample separation, sample extraction, and sample preconcentration/amplification steps of the pretreatment process and the determination of aflatoxins, antibiotics, drugs, melamine, and foodborne pathogens in the detection process. Recent proposals for the general quality inspection of milk samples, including the viscosity and presence of adulteration, are also discussed. The review concludes with a brief perspective on the challenges facing the future development of microfluidic devices for the analysis of milk samples in the coming years.

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