Teledyne API Model 200AU NOX Analyzer Instruction Manual, 02293, Rev. F

Given that the NO concentration is known for this reaction, the resultant concentration of NO2 can be determined. Ozone is added to excess NO in a dynamic calibration system, and the NO channel of the chemiluminescent analyzer detects the changes in NO concentration. After the addition of O3, the observed decrease in NO concentration on the calibrated NO channel is equivalent to the concentration of NO2 produced. The amount of NO2 generated may be varied by adding varying amounts of O3 from a stable O3 generator. All zero air used in this procedure should conform to the requirements stated in Section 7.

Dynamic calibration systems based on this principle are commercially available such as the Teledyne API Model 700 Calibrator, or may be assembled by the user. A recommended calibration system is described in the Federal Register1 and detailed in TAD.2

7.6.4.2 GPT Calibrator Check Procedure

It has been determined empirically that the NO-O3reaction goes to completion (<1% residual O3) if the NO concentration in the reaction chamber (ppm) multiplied by the residence time (min.) of the reactants in the chamber is >2.75 ppm-min. The theory behind the development of this equation is in the Federal Register1 and in TAD.2

It is currently not known whether this relationship holds up at the extremely low concentrations of which the M200AU is capable. We therefore recommend that the GPT procedure be carried out at the normal flow-rate and concentrations encountered in ambient air monitoring, then performing a serial dilution of the resultant gas stream to get the low concentration values.

The following procedures and equations should be used to determine whether an existing GPT calibration system will meet required conditions for a specific calibration.

For calibrators that have known pre-set flow rates, use equations 7-5 and 7-6 of steps 7 and 8 (below) to verify the required conditions. If the calibrator does not meet specifications, follow the complete procedure to determine what flow modifications must be made.

1.Select a NO standard gas that has a nominal concentration in the range of 50 to 100 ppm. Determine the exact concentration [NO]STD by referencing against an NIST-SRM, as discussed in Section 2.0.7 (Q.A. Handbook).

2.Determine the volume (cm3) of the calibrator reaction chamber (VRC). If the actual volume is not known, estimate the volume by measuring the approximate dimensions of the chamber and using an appropriate formula.

3.Determine the required minimum total flow output (FT) using Equation 7-1:

FT = analyzer flow demand (cm3/min) x 110/100 Equation 7-1

If more than one analyzer is to be calibrated at the same time, multiply FT by the number of analyzers.

7-13

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Teledyne 200AU instruction manual GPT Calibrator Check Procedure, FT = analyzer flow demand cm3/min x 110/100 Equation

200AU specifications

The Teledyne 200AU is a cutting-edge analytical instrument designed primarily for trace and ultra-trace analysis of elements in various liquid samples. Renowned for its reliability and precision, this inductively coupled plasma mass spectrometer (ICP-MS) is widely utilized in environmental monitoring, food safety, clinical diagnostics, and geochemical research.

One of the distinguishing features of the Teledyne 200AU is its exceptional sensitivity, allowing for the detection of elements at concentrations as low as parts per trillion (ppt). This sensitivity is crucial for applications where even minute traces of contaminants can have significant implications. The instrument also boasts a wide dynamic range, accommodating high-concentration samples without compromising accuracy.

The Teledyne 200AU incorporates advanced technologies that enhance its analytical capabilities. At the core of its design is a robust ICP source, which ensures optimal ionization efficiency. The instrument also features a high-resolution quadrupole mass analyzer, which enables precise separation and identification of ions based on their mass-to-charge ratio. This feature is essential for distinguishing between isotopes and analyzing complex mixtures.

Another notable characteristic of the Teledyne 200AU is its user-friendly interface, which simplifies the operation and data management processes. The software is intuitive, offering sophisticated data processing algorithms that streamline analysis. Users can easily access real-time data visualization, facilitating timely decision-making based on analytical results.

The instrument is built with durability in mind, featuring a compact design that allows for easy integration into various laboratory environments. The Teledyne 200AU is also equipped with state-of-the-art safety features, including enhanced cooling systems and automated shutdown protocols to protect both the instrument and the user.

Moreover, the Teledyne 200AU supports a variety of sample introduction methods, including nebulization and laser ablation, providing flexibility to accommodate different types of samples and experimental needs. Its multi-element capability further enhances its versatility, allowing simultaneous detection of multiple elements in a single analysis.

In summary, the Teledyne 200AU stands out as a premier instrument in the field of mass spectrometry. Its combination of high sensitivity, advanced technology, user-friendly features, and robust design makes it an invaluable tool for scientists and researchers seeking precise elemental analysis across various disciplines.