The U5000AT⁺ Ultrasonic Nebulizer offers enhanced detection limits (up to 10x or greater) for ICP-AES and ICP-MS.

• AutoTune Power Supply
• Detection Limit improvement up to 10x or greater
• Efficient Desolvation System
• Optimized for Use with ICP-AES or ICP-MS
• Stable Operation
• Modular Design

AutoTune Power Supply
CETAC's AutoTune Power Supply automatically senses changes in sample composition to ensure uniform and consistent aerosol generation. This AutoTune feature permits continuous operation of the nebulizer even in the absence of a sample, allowing unattended operation.

Detection Limits
Detection limits obtained with the U-5000AT⁺ on ICP-AES are listed below for both radial and axial ICP torch configurations. Detection limits are improved in a range from five to 25 times, depending upon the analyte. The U-5000AT⁺ may also be coupled with an ICP-MS, providing sub-ppt detection limits for many elements, particularly the rare earths and actinides.

Comparison of Detection Limits (µg/L)
(Radial Viewing)

Notes: Detection limits are based on 3 sigma, with a 10-second integration time.

Instrument used was a Thermo Jarrell Ash ICAP 61.

Comparison of Detection Limits (µg/L)
(Axial Viewing)

Notes: Detection limits are based on 3 sigma, with a 20-second integration time.

Instrument used was a PerkinElmer 4300DV ICP-OES.

Comparison of Detection Limits (ng/L)
(Quadrupole ICP-MS)

Notes: Detection limits are based on 3 sigma, with a 9.9-seconds integration time.

Instrument used was an Agilent 4500 ICP-MS.

Utilizing the U-5000AT⁺ for Aqueous Samples by ICP-AES

The CETAC U-5000AT⁺ improves detection limits on any ICP-AES by factors of five to 25. This improvement in ICP-AES detection limits allows the transfer of significant amounts of work from Graphite Furnace AA to ICP-AES, where sample throughput is much greater.

The USEPA Method 200.15 allows users to take advantage of the labor savings, simplified operation, and improved analysis time of ICP-AES with the U-5000AT⁺.

Signal Stability
Long-term (10-hour) signal stability with the U-5000AT⁺ for 500µg/L Pb spiked into drinking water is shown in the chart below. Note the average stability is excellent at 0.40% RSD. (Each data point represents the mean of 180 ten-second measurements.) No internal standard was used in the stability experiment.

Signal Stabilization and Sample Rinse-Out
Signal stabilization, (Click figure on right), with the U-5000AT⁺ is rapid, with signal reaching its plateau approximately 12 seconds after the sample reaches the ultrasonic transducer. Sample rinse-out is also fast, with the analyte concentrations decreasing to background levels after approximately 25 seconds. Sample and rinse solution (1% HNO3) uptake rate was 2.0 mL/min.

Modular Design
The CETAC U-5000AT⁺ is equipped with a nebulizer/desolvation module. All parts of the U-5000AT⁺, which are in contact with the sample, are within this removable module. The wide dynamic range of ICP instrumentation means that users may determine elements at high levels in some samples and at ultra trace levels in others. With the U-5000AT⁺, a second (optional) nebulizer/desolvation module can be used to alleviate sample memory problems and simplify nebulizer cleanup. Changeover from one module to another takes less than five minutes.

Specifications

• Sample Uptake Rate: 0.5 - 2.5 ml/min
• Nebulizer Gas Flow: 0.5 - 1.5 L/min
• Desolvation Heating Temp: 120ºC - 160ºC (Factory Setting: 140ºC)
• Desolvation Cooling Temp: -20ºC to 10ºC (Factory Setting: 2ºC)
• Power Requirements:
  • 100 - 120 VAC, 50-60 Hz, 4A, 520W
  • 220 - 240 VAC, 50-60 Hz, 2A, 520W
• Dimensions: 35.6 cm W x 34.9 cm D x 25.4 cm H
• Weight: 27 lbs (12.3 kg)
• Shipping Weight (With Cart and Accessories): 84 lbs (38.2 kg)