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Cooper Environmental has been known globally over the last 10 years for the Xact series of instruments that use an automated X-Ray Fluorescence (XRF) technology for continuously measuring metals content in ambient and smoke stack air. The continuous water analyzer uses the same proven XRF technology to measure up to 69 different elements simultaneously. The Xact 920 system allows for analysis of continuously-drawn aqueous samples for user-selected metals.
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A measured amount of unknown sample is blended with a known amount of internal standard which is continuously nebulized, evaporated, and collected onto the filter tape. The liquid sample is aerosolized facilitating the removal of water and allowed metal salts to be concentrated on the filter tape. This method of pre-concentration allows detection limits in the low parts per billion (ppb) ranges for elements ranging from potassium to uranium. The concentrated deposit is automatically advanced and analyzed by XRF for selected metals as the subsequent sample is collected. Sampling and analysis are performed continuously and simultaneously, except during the advancement of the tape (~20 sec) and during daily-automated quality assurance checks.
Sampling, analysis, and near-real time reporting every 15, 30, 60, and 120 min in ppb
Automatic quality assurance, alarms, and control features
Proven XRF technology
Identification and measurement of 23 elements simultaneously
Incorporates an XRF stability check with every sample analyzed
Provides and automatic daily upscale and QA checks
Highly sensitive and reliable (low ppb to ppm range)
Nondestructive analysis allows for sample archiving
Low maintenance cost
Extremely stable, requiring only automated calibration checks
Analytical recalibration frequency generally less than once per year
