Determination of uranium in environmental samples using inductively coupled plasma mass spectrometry

Boomer, D. W.; Powell, M. J.

doi:10.1021/ac00150a019

Cited by 95 publications

(33 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other spectral characteristics such as metal oxide and M2' abundance are also sensitive to aerosol gas flow rate, power, and sampling position (109,127,132,133,(143)(144)(145)(146)(147)(148)(149), as well as sampler/skimmer design (117,129,146) and load coil geometry (109,116). The configuration and potentials of the ion lens elements can also greatly affect ion signals (129,138,146,150) and the accuracy of isotope ratio measurements (150,151).…”

Section: Analytical Figures Of Meritmentioning

confidence: 99%

Inductively coupled plasma mass spectrometry

Houk,

Thompson

1988

Mass Spectrometry Reviews

125

View full text Add to dashboard Cite

Section: Analytical Figures Of Meritmentioning

confidence: 99%

Inductively coupled plasma mass spectrometry

Houk,

Thompson

1988

Mass Spectrometry Reviews

125

View full text Add to dashboard Cite

“…Current uranium detection relies mainly on instrumental analysis methods, which are based on intrinsic physical properties of the element, such as atomic absorption (15), emission (16), phosphorescence (17,18), mass (19), or redox potential (20). Most instrumental analysis methods detect only total uranium with poor portability.…”

mentioning

confidence: 99%

A catalytic beacon sensor for uranium with parts-per-trillion sensitivity and millionfold selectivity

Liu

Brown

Meng

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

488

476

View full text Add to dashboard Cite

Here, we report a catalytic beacon sensor for uranyl (UO 2 2؉ ) based on an in vitro-selected UO 2 2؉ -specific DNAzyme. The sensor consists of a DNA enzyme strand with a 3 quencher and a DNA substrate with a ribonucleotide adenosine (rA) in the middle and a fluorophore and a quencher at the 5 and 3 ends, respectively. The presence of UO 2 2؉ causes catalytic cleavage of the DNA substrate strand at the rA position and release of the fluorophore and thus dramatic increase of fluorescence intensity. The sensor has a detection limit of 11 parts per trillion (45 pM), a dynamic range up to 400 nM, and selectivity of >1-million-fold over other metal ions. The most interfering metal ion, Th(IV), interacts with the fluorescein fluorophore, causing slightly enhanced fluorescence intensity, with an apparent dissociation constant of Ϸ230 M. This sensor rivals the most sensitive analytical instruments for uranium detection, and its application in detecting uranium in contaminated soil samples is also demonstrated. This work shows that simple, cost-effective, and portable metal sensors can be obtained with similar sensitivity and selectivity as much more expensive and sophisticated analytical instruments. Such a sensor will play an important role in environmental remediation of radionuclides such as uranium.DNA ͉ DNAzyme ͉ fluorescence ͉ deoxyribozyme ͉ catalytic DNA

show abstract

“…Methods employed to detect and quantify uranium concentrations often exploit the physical properties of uranium, including phosphorescence kinetics (5), atomic emission (16), and mass spectrometry characteristics (4). These methods are extremely sensitive and selective for uranium, but they allow low sample throughput and are not very portable.…”

mentioning

confidence: 99%

Caulobacter crescentus as a Whole-Cell Uranium Biosensor

Hillson

Andersen

et al. 2007

Appl Environ Microbiol

View full text Add to dashboard Cite

We engineered a strain of the bacterium Caulobacter crescentus to fluoresce in the presence of micromolar levels of uranium at ambient temperatures when it is exposed to a hand-held UV lamp. Previous microarray experiments revealed that several Caulobacter genes are significantly upregulated in response to uranium but not in response to other heavy metals. We designated one of these genes urcA (for uranium response in caulobacter). We constructed a reporter that utilizes the urcA promoter to produce a UV-excitable green fluorescent protein in the presence of the uranyl cation, a soluble form of uranium. This reporter is specific for uranium and has little cross specificity for nitrate (<400 M), lead (<150 M), cadmium (<48 M), or chromium (<41.6 M). The uranium reporter construct was effective for discriminating contaminated groundwater samples (4.2 M uranium) from uncontaminated groundwater samples (<0.1 M uranium) collected at the Oak Ridge Field Research Center. In contrast to other uranium detection methodologies, the Caulobacter reporter strain can provide on-demand usability in the field; it requires minimal sample processing and no equipment other than a hand-held UV lamp, and it may be sprayed directly on soil, groundwater, or industrial surfaces.

show abstract

Determination of uranium in environmental samples using inductively coupled plasma mass spectrometry

Cited by 95 publications

References 5 publications

Inductively coupled plasma mass spectrometry

Inductively coupled plasma mass spectrometry

A catalytic beacon sensor for uranium with parts-per-trillion sensitivity and millionfold selectivity

Caulobacter crescentus as a Whole-Cell Uranium Biosensor

Contact Info

Product

Resources

About