Nitrous oxide isotope analyzer (δ 15N α, δ 15N β, δ 15N, δ 17O, δ 18O, N2O)

LGR(Currently under ABB Canada)The Nitrous Oxide Isotope Analyzer (INA)It is a nitrogen isotope analyzer that uses laser absorption spectroscopy technology, and also measures δ using laser method¹⁷O's N₂O isotope analyzer.

Compared to isotope ratio mass spectrometry technology, INA has many inherent advantages. Firstly, it is not affected by CO of the same molecular weight in the target gas₂The impact; Secondly, it can distinguish¹⁵N^αand¹⁵N^βAnd simultaneously measure δ¹⁵N、δ¹⁷O and δ¹⁸O， Greatly improved the ability to characterize nitrogen cycling; Furthermore, it has the ability to perform both intermittent injection and in-situ continuous measurement. Therefore, INA is a brand new N with broad application prospects₂O isotope measurement equipment.

INA adopts the off-axis integrated cavity output spectroscopy (OA-ICOS) technology designed by LGR, which eliminates the disadvantage of CRDS technology that requires continuous cavity laser wavelength matching during measurement to improve weak signal intensity. This eliminates the need for complex laser alignment adjustment, temperature control, and wavelength monitoring in the analyzer. Real time display of high-resolution laser absorption spectra. Adopting a built-in computer (Linux OS) to provide continuous storage and measurement of data. With remote control function, users can operate the analyzer from any location through the network, and can also share real-time data and perform instrument diagnosis through remote login.

1. Using a mid infrared quantum cascade laser for simultaneous measurement¹⁴N¹⁵N¹⁶O,¹⁵N¹⁴N¹⁶O,¹⁴N¹⁴N¹⁸O,¹⁴N¹⁴N¹⁷O, N₂O

2. Measure δ¹⁵N、δ¹⁵N^αAnd δ¹⁵N^βQuantify N₂Source and sink of O

3. Measure δ¹⁷O、δ¹⁸O， Quantitative nitrification process

4. EP type, achieving smaller drift and higher stability

5. No need for liquid nitrogen cooling

6. Combination of in-situ continuous measurement and manual intermittent injection

Repeatability/accuracy（1σ，300 seconds）：

[N₂O]：0.1 ppb

δ¹⁵N, δ¹⁵N^α, δ¹⁵N^β: Better than 1 ‰

δ¹⁷O： Better than 1 ‰ (N₂O ＞ 1 ppm）

δ¹⁸O： Better than 2 ‰

1 Hz

Drift (15Minute average, standard temperature and pressure, 24Hour)

N₂O：1 ppb

δ¹⁵N, δ¹⁵N^α, δ¹⁵N^β, δ¹⁷O, δ¹⁸O：＜1‰

N₂O：0.3~100 ppm

N₂O：0~1000 ppm

Operating temperature: 0~45 ℃

Environmental humidity: 0~100% RH, no condensation

0.003 ℃

0.001 torr

Digital (RS 232), Analog, Ethernet USB

115/230 VAC， 50/60 Hz，400 W

35.6 cm（H）x 43.2 cm（W）x 114.3 cm（D），68 kg

Ordering information:

◆Model number（Model）：

GLA451-N2OI2（N₂O,δ¹⁵N,δ¹⁵N^α,δ¹⁵N^β,δ¹⁸O）

GLA451-N2OI3（N₂O,δ¹⁵N,δ¹⁵N^α,δ¹⁵N^β,δ¹⁷O,δ¹⁸O）

◆ Optional attachments:

1. MIU16/8 channel multiplexer

2. SC-100016/8-channel intelligent synchronous multiplexer (produced by LICA)

3. ACC-DP40： N940 vacuum pump (gas update time 1 second)

4. DCS-200Dynamic dilution system, capable of automatic dilution and expanding the range by 100 times

5. OPT-BATCH-INJECTIONIntermittent injection system (integrated with analyzer), which can measure samples inside the airbag by manual injection

6. LI-6000Intelligent injection controller, connected to TOC and MCIA, for solid or liquid C isotope determination

After sales support: Provide lifelong technical support and after-sales service

manufacturer:ABB Canada

The use of laser absorption spectroscopy to measure stable isotopes has some advantages in application compared to traditional isotope ratio mass spectrometry techniques. Here, the main focus is onN₂OIAGive a brief introduction as an example:

Firstly, the measurement is not affected by the same molecular weight in the target gasCO₂ The impact:

N₂OandCO₂ The molecular weight is the same as44It cannot be distinguished by quality. In the environmentCO₂ The concentration isN₂OMore than a thousand times, so it must be removed before measurementCO₂This not only increases the pre-processing process, but also bringsThere is a system error. Similarly, using a mass spectrometer for measurementCO₂ in13CWhen the abundance is high,¹³C¹⁶O₂ The molecular weight is45And¹⁵N¹⁴N¹⁶OThat's right45Even¹²C¹⁷O¹⁶OThe molecular weight is also45These are all systematic errorsPart of it. And using spectral methods,N₂OandCO₂ The absorption peaks do not interfere with each other, so they can be eliminatedExcept for such impacts.

Secondly, the ability to distinguish isotopic isomers¹⁴N¹⁵NOand¹⁵N¹⁴NO：

N₂OMolecules are linearly arranged molecules（N-N-O）There are two main types of components¹⁵NThe Same as AtomsIsotope isomer molecules. The middle is¹⁵NThe molecule（¹⁴N¹⁵N¹⁶O）And the end is¹⁵NThe molecule（¹⁵N¹⁴N¹⁶O）Named separately as¹⁵N^α and¹⁵N^βThese two isotopic isomers have different spectral absorption peaks that can be clearly observedThe difference is difficult to distinguish using mass spectrometry. And distinguishing isomers is equivalent to adding functionality and enrichingThe means of depicting the nitrogen cycle.

Thirdly, it can be used in the wild:

be-allLGRThe analyzer has better environmental tolerance and can be used in various harsh environments, reducingThe errors caused by sampling composition.

Fourthly, it is capable of high-frequency continuous measurement:

The instrument can perform high-frequency continuous measurements (in seconds), which cannot be achieved by mass spectrometry equipment. Currently, there are already largeThe case of continuous measurement of isotopes has opened up a broad direction for the application of isotope data.