25 Pre-defi ned Method
For convenient routine analysis, the UV7 spectrophotometer contains a pre-defi ned method for the identifi cation of vitamin B12, which includes the spectrum scan and the automatic evaluation of the relevant results. The peaks in the spectrum are identifi ed and their locations are compared to the nominal data, taking into account permitted tolerances.
The absorbance ratios are also automatically calculated and compared to the nominal values so that the fi nal result displays all acceptance criteria for the identifi cation of cyanocobalamin. The method can be edited to suit user requirements.
Using the UV7 Excellence spectrophotometer, cyanocobalamin identifi cation is a simple, fast and effi cient method, with automatic evaluation reducing the risk of error.
Table 1. Acceptance criteria and measured results of a cyanocobalamin sample. References
a measured Vitamin B12 sample. All criteria were fulfi lled, confi rming the identity and purity of cyanocobalamin in the sample.
1. Görög, S. Ultraviolet-visible spectrophotometry in pharmaceutical analysis, 1995, CRC Press.
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www.labmate-online.com/article New Spectrometer Offers Higher Acquisition Speed for Light Measurement
Ocean Optics has upgraded its Ocean FX miniature spectrometer to now offer an acquisition speed of up to 4,500 scans per second, high-sensitivity CMOS detector performance and integration times as low as 10 µs. With fl exible features to manage saturation intensity, it is suitable for high-intensity LED and light source measurement, laser characterisation, spectral analysis of rapid events and plasma monitoring.
Depending on the performance of the operating system to which it is connected, Ocean FX can acquire up to 4,500 scans per second. This speed allows users to collect more spectral information over shorter periods of time, contributing to better results. The high speed is also useful for capturing rapidly occurring modulation of light output, such as fl icker in LEDs and other sources (see Ocean Optics Application Note:
https://oceanoptics.com/ocean-fx-high- speed-applications-in-home-lighting/). The powerful onboard processor holds up to 50,000 spectra in its memory and can perform averaging of up to 5,000 spectra, signifi cantly speeding up transfer times and reducing bandwidth requirements.
Ocean FX is anchored by a high-sensitivity CMOS detector that is responsive from 200-1,100 nm. To account for varying light intensity, its adjustable integration time ranges from 10 seconds down to 10 µs. This ability to integrate over much briefer periods - microseconds instead of milliseconds - avoids saturating the detector in even extremely high-intensity applications. Ocean FX’s interchangeable slits give users the ability to further adjust for differences in light source intensity.
Users can operate the Ocean FX via Gigabit Ethernet, Wi-Fi, USB and now SPI communication protocols. The addition gives OEM users greater design fl exibility, eliminating the need for cables or additional circuitry to convert signals. Ocean FX is available in versions optimised for the UV-Vis (200-850 nm), Vis-NIR (350-1,000 nm) and extended (200-1,025 nm) wavelength ranges. Enhanced-sensitivity, custom and OEM confi gurations are also available.
44502pr@reply-direct.com Laser Gas Detection TDLS Technology
Axetris uses proprietary technology-enhanced TDLS for gas detection. A 0.05 nm narrow bandwidth diode laser beam is used to scan across an absorption band of the target gas, thus performing a high-resolution near infrared absorption measurement.
Laser gas detection, based on Tunable Diode Laser Spectroscopy or TDLS, provides a valid solution to many challenges in environmental gas monitoring and process control.
The TDLS technology offers unique advantages: precise optical, contactless measurements; excellent target gas selectivity; sub ppm-level detectivity for gases such as CH4, NH3, HCl, H2O and CO2; low cost of ownership; high stability, reliability and availability in the fi eld (no regular replacements/ calibration needed).
Axetris’ laser gas sensing modules are a cost effective solution for OEM integrators active in emission control and environmental monitoring. It allows for simple integration due to its self-contained and standalone system design. It also offers hot-gas measurements up to 220°C, which provide a robust sensing solution for highly contaminated gas sample typically for SCR DeNOx and other applications. With these gas sensing modules, Axetris are able to cover a wide range of gas monitoring & detection applications in combustion control, leak detection, breath gas analysis, greenhouse gas monitoring, safety and many more.
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