An Integrated Microwave Digestion Labstation for the Modern Laboratory

In the Ethos EZ Labstation, Milestone Inc. has developed an integrated monitoring and control approach for microwave sample preparation that combines three unique elements: our patented vent and reseal vessel technology, the newly developed QP chemical sensor, and EasyCONTROL software. Combined, these three innovations (along with our internal temperature monitoring system) completely control the heating process, prevent sample loss, and increase the safety of operation.

QP "Quality Pressure" Chemical Sensor

The new QP device is another first from Milestone's R&D department. This unique sensor continuously monitors the level of acid vapors in the microwave cavity of the Ethos EZ. Once over a preset level, the sensor automatically responds by adjusting the microwave power. All vessels in the cavity are monitored simultaneously and independently to effectively limit the pressure in each vessel, thereby preventing their over-pressurization and venting. The QP Sensor plays the role of a "pressure cap" for every vessel during the digestion process.

The Use of Microwave Digestion and High Purity Quartz Inserts to Increase Method Detection Limits for ICP-OES or ICP-MS Analysis

The benefits of using Milestone's QS-50 Quartz Vessel Inserts include a dramatic reduction in acid use, greater detection levels, and a reduction in carry-over effects. This technical report describes the precision and accuracy obtainable with microwave digestion using QS-50 graduated high-purity quartz inserts followed by ICP-AES and ICP-MS analysis.

Meeting MACT Regulations for As, Hg, Pb, Cd, Se, Cu, Pb, and Ni with Microwave-Accelerated Acid Digestion

The US EPA's MACT (Maximum Achievable Control Technology) regulations require industrial waste disposal facilities to monitor heavy metal emissions. The permits call for an overall reduction in heavy metal emissions and controlled release procedures to achieve this goal. All samples must be analyzed for As, Hg, Pb, Cd, Se, Cu, Pb, and Ni before being incinerated. Microwave decomposition is ideally suited for this application.