Microwave Digestion System Vessels
The unique dual seal of the new iPrep™ allows for the highest working conditions of any microwave digestion vessel. This means it can digest extremely difficult materials such as PET and bunker oil with ease. It also will digest twice as much sample as a typical high performance vessel. This allows for better homogeneity and lower detection ...
BLADE
Experience the easiest to use microwave digestion system ever built. Simply add your sample and acid to the BLADE vessel and snap on a cap. ... Load your vessel into the autosampler and the BLADE will then process your samples automatically, including cool down. No vessel assembly and an easy to clean high purity quartz vessel make this the ...
Masahiro SUZUKI | Research profile
The process for synthesizing metallic oxide powders by the microwave denitration method was investigated using hexahydrated nickel nitrate and trihydrated copper nitrate aqueous solutions, and the ...
Synthesis of Mixed Actinide Oxides Using Microwave …
A method has been developed for producing mixed actinide oxides suitable for fabricating mixed nitride uranium plutonium fuel for fast neutron reactors. The method is based on the use of microwave radiation for the direct denitration of actinide nitrate solutions. The possibility of producing uranium, plutonium, and neptunium-mixed oxides was shown. A pilot installation …
Microwave Digestion of Method Note Quartz Powder
Gently swirl the mixture and wait approximately 15 minutes before closing the vessel. HF should be added slowly and carefully to the sample. Allow any initial reaction to subside before …
Preparation of uranium oxides by reductive denitration of …
Autoclave denitration of solid uranyl nitrate in the presence of hydrazine hydrate at 120°C under the action of microwave radiation (MWR) leads to the formation of uranium dioxide with simultaneous breakdown of excess hydrazine hydrate and nitrate ions. The reaction yields UO2 when performed in an open system in a reducing medium and U3O8 when performed …
(PDF) Use of Microwave Radiation for Denitration …
The effect of sintering temperature and time on the density and grain size of UO2 pellets was investigated for the microwave sintering process where the heating rate was properly controlled.
A Simple Closed-Vessel Nitric Acid Digestion Method …
microwave quartz vessels. Then, 3.0 mL HNO 3 was added the 0.15-g samples using an Optifix® Basic Dispenser (EM Science, Gibbstown, NJ USA). A seal-forming tool was used to expand the lip-seals on the lids that were placed in each vessel. The vessels were placed in a bomb jacket with caps screwed on hand-tight. The vessels were placed in
Application of Microwave Radiation to Produce Uranium …
Abstract The possibility of producing UO2 powder from UO3 using microwave radiation (power 300 W) in the presence of organic compounds with amino groups: carbohydrazide (CH), acetohydroxamic (AHA), and aminoacetic (glycine) acids has been investigated. It was found that in these processes in an oxygen-free atmosphere, UO2 is …
ETHOS UP Microwave Digestion System
Both quartz vessels and insert options are available for the SK-15 and MAXI-44 rotors. Quartz is the ultimate vessel material for ultra-trace analysis, since it can be cleaned more effectively, and has lower background levels than even extra …
MARS 2
A moderate microwave digestion system with optional disposable inserts. Digest more samples in less time with MARSXpress vessels and optional disposable Teflon, Glass, or Quartz inserts. ... Vessel inserts offer a convenient way to process samples with little to no vessel cleaning. The choice of insert will depend upon digestion temperature and ...
(PDF) Preparation of Solid Solutions of Uranium and
A procedure was developed for preparing powders of solid solutions of uranium dioxide with 3 or 10 wt % Ce (as Am surrogate) from nitric acid solutions using microwave radiation.
Applications of microwaves in nuclear chemistry and engineering
The experimental results show that microwave assisted thermal denitration process has obvious advantages for the conversion of HEU compared with other processes such as sol–gel process and precipitation process. ... this is because that the denitration can be accomplished in the same vessel. So the microwave denitration is a perspective ...
Development of a Process for Co-Conversion of Pu-U …
Vol. 20, No. 7 (July 1983) REVIEW (M. Koizumi ei al.) 531 denitration apparatus scralching olf llle denilraled calciiialioii - I educlion ball Illill MOX from tile vessel furnace Fig. 1 Flow sheet of the process for co-conversion of Pu-U nitrate solutions using microwave heating method Denitration Vessel : 20crnZ Pyrex (Slop1 - Glass Vessel
MiniWAVE Microwave Digestion System
A family of microwave digestion application notes covering a wide range of categories (environmental, food, mining, petroleum, etc.) is available. They describe microwave digestion of samples in a closed vessel environment. These application notes can be used as the first step to create your own sample digestion methods.
How to Clean and Safely Remove HF from Acid Digestion …
Microwave power programs used for (a) HF evaporation and (b) soil digestion.As mentioned above, two different MW power programs were developed in the present work. Figure 2a show the power program used for all HF evaporation cycles and the first preliminary digestion tests, while Figure 2b reports the MW program involved in the validated protocol for the dissolution of the …
Milestone Report Evaluation of Co-precipitation …
'Microwave Heating (MH)" automated multi-batch process developed in Japan and (2) the "Modified Direct Denitration (MDD)" continuous process being developed in the USA. Brief comparative descriptions of the U/TRU co-conversion processes are described below. More ... vessel. Precipitation occurs at a pH of 7-9. A particular advantage of ...
SCP SCIENCE Microwave DigeS
Vessels operate at 34 atms (500 psi) and are pretested to 90 atms (1305 psi) 13 gauge Stainless Steel tunnel/cavity, to protect the user Over temperature auto shut down Dual explosion guards on tunnel/cavity entries racks and vessels Volume calibrated Quartz vessels, for normalization No assembly PFA Teflon® vessels with Quartz sleeve supports
Fluoropolymers for digestion vessels
Digestion vessels or pressure digestion vessels are one of the core components of modern microwave digestion systems in sample preparation and must meet a number of requirements. Microwave transparency ->In order to ensure a fast in situ infrared temperature measurement without delay, there must be no material between the sensor and the sample ...
UO 2 Ceramic Grade Powders Prepared by Direct Microwave Denitration …
Based on the successful development of the co-conversion process, the microwave heating direct denitration facility with a 10 kg MOX/d capacity has been constructed adjacent to the reprocessing plant.
Microwave Digestion Vessels and Accessories
and slags in minutes! Available liners: Teflon, Pyrex®, or quartz. HP-500 Plus HP-500 Plus vessels are ideal for routine digestion applications. Process up to 14 high-pressure vessels per run with temperatures up to 260 °C or pres-sures up to 500 psi. Available liners: Teflon, Pyrex®, or quartz. Omni One vessel does it all!
Systems for Microwave-Assisted Wet Digestion
The digestion vessels are made from high-purity quartz; only the seal at the top of the vessel is made from PTFE. Simultaneous digestion of a maximum of two samples can be achieved. More recently, Anton Paar introduced the Multiwave MW-digestion system (1000 W with unpulsed power control, 2.45 GHz) [79], marketed by Perkin–Elmer.
UO2 Ceramic Grade Powders Prepared by Direct Microwave Denitration …
In this paper, the denitration process was studied by depressing the pressure inside the vessel where the solution is denitrated. Intermediate and final products were characterized. It was demonstrated that when working pressure ranges between 520 and 970 hPa during denitration, high density UO 2 pellets can be obtained without resorting to a ...
Electromagnetic field analysis for the development of …
produced from the reprocessing process of spent fuels, the microwave heating equipment with the ... denitration vessel was made of silicon nitride as a low dielectric
Development of Microwave Heating Method for Co …
1. Denitration Reaction It is widely recognized that dielectrics are internally heated up in a microwave electrical field. The MH method is such a process that Pu-U nitrate solution is heated up, concentrated and then denitrated to MOX powder by …
Microwave based oxidation process for recycling the off …
The integrated process was developed by combining three basic ap- proaches of recycling namely mechanical micronisation, air oxidation (for MOX) and microwave dissolution-denitration.
Microwave Digestion of quartz – Berghof Products
A sample preparation method of quartz for elemental analysis is introduced below. The samples are digested using speedwave XPERT in DAP-60 vessels. During the digestion, the reaction …
METHOD 3015A MICROWAVE ASSISTED ACID …
concentrated nitric acid and concentrated hydrochloric acid, using microwave heating with a suitable laboratory microwave unit. The sample and acid(s) are placed in a fluorocarbon polymer (such as PFA or TFM) or quartz microwave vessel or vessel liner. The vessel is sealed and heated in the microwave unit for a specified period of time.
Microwave Digestion High-throughput Sample …
Meeting diverse digestion needs, the 8 QZ-100 quartz closed vessel set significantly enhances visibility and digestion capacity, handling even the most challenging materials. Utilizing remote Wi-Fi video monitoring, it enables …
Cleaning of digestion vessels
Pressure digestion vessels such as those used in modern microwave digestion systems for element determination in analytical chemistry are exposed to high temperatures and pressures. To ensure that the vessels have a long service life, regular cleaning is recommended.