H 2 measurement devices.

(a) Component requirements. We recommend that you use an analyzer that meets the specifications in § 1065.205. Note that your system must meet the linearity verification in § 1065.307. (b) Instrument types. You may use any of the following analyzers to measure H 2 : (1) Magnetic sector mass spectrometer. (2) Raman spectrometer. (c) Interference verification. Certain compounds can positively interfere with magnetic sector mass spectroscopy and raman spectroscopy by causing a response similar to H 2 . Use good engineering judgment to determine interference species when performing interference verification. In the case of raman spectroscopy, determine interference species that are appropriate for each H 2 infrared absorption band, or you may identify the interference species based on the instrument manufacturer's recommendations. [89 FR 29795, Apr. 22, 2024]