Microwave digestion—ICP-MS for elemental analysis in ambient airborne fine particulate matter: Rare earth elements and validation using a filter borne fine particle certified reference material

2007 ◽  
Vol 599 (2) ◽  
pp. 170-176 ◽  
Author(s):  
Pranav Kulkarni ◽  
Shankararaman Chellam ◽  
James B. Flanagan ◽  
R.K.M. Jayanty
Keyword(s):  
Rare Earth ◽  
Particulate Matter ◽  
Reference Material ◽  
Rare Earth Elements ◽  
Elemental Analysis ◽  
Fine Particle ◽  
Microwave Digestion ◽  
Fine Particulate Matter ◽  
Fine Particulate ◽  
Icp Ms

scholarly journals Determination of Rare Earth Elements in Plant Samples by ICP-MS with Microwave Digestion

2021 ◽  
Vol 14 (4) ◽  
pp. 515-526
Author(s):  
Anna A. Kravchenko ◽  
◽  
Irina V. Nikolaeva ◽  
Stanislav V. Palesskiy
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Certified Reference Materials ◽  
Microwave Digestion ◽  
Plant Materials ◽  
Ms Analysis ◽  
Icp Ms ◽  
Relative Standard ◽  
Hf Addition

Method of microwave digestion using HNO3, HCl and HF in MARS‑5 system followed by ICP-MS analysis is proposed for determination of rare earth elements (REE) in plant materials. Limits of detection are 0.0001–0.001 ppm and allow for determination of all REE in certified reference materials Tr‑1, LB‑1 and EK‑1 and new reference material NSP‑1, relative standard deviations are lower than 13 %.Influence of HF addition during microwave digestion in UltraWAVE system on the ICP-MS analysis of REE in plant materials depending on silica content is studied. Necessity of HF addition during microwave digestion for better REE recoveries is shown for plant materials with Si contents exceeding 0.1 %

scholarly journals Roll-to-Roll Production of Spider Silk Nanofiber Nonwoven Meshes Using Centrifugal Electrospinning for Filtration Applications

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5540
Author(s):  
Fabian Müller ◽  
Shakir Zainuddin ◽  
Thomas Scheibel
Keyword(s):  
Particulate Matter ◽  
Pressure Drop ◽  
Fine Particle ◽  
Spider Silk ◽  
High Efficiency ◽  
Fine Particulate Matter ◽  
Medical Applications ◽  
Silk Proteins ◽  
Roll To Roll ◽  
Fine Particulate

Filtration systems used in technical and medical applications require components for fine particle deep filtration to be highly efficient and at the same time air permeable. In high efficiency filters, nonwoven meshes, which show increased performance based on small fiber diameters (e.g., using nanofibers), can be used as fine particle filter layers. Nanofiber nonwoven meshes made by electrospinning of spider silk proteins have been recently shown to exhibit required filter properties. Needle-based electrospinning, however, is limited regarding its productivity and scalability. Centrifugal electrospinning, in contrast, has been shown to allow manufacturing of ultrathin polymer nonwoven meshes in an efficient and scalable manner. Here, continuous roll-to-roll production of nonwoven meshes made of recombinant spider silk proteins is established using centrifugal electrospinning. The produced spider silk nanofiber meshes show high filter efficiency in the case of fine particulate matter below 2.5 µm (PM2.5) and a low pressure drop, resulting in excellent filter quality.

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