LED Based Spectrophotometer can compete with conventional one

Abstract

Spectrophotometers are the common devise used for blood analysis. These analyses are simply optioned from the transmittance of monochromatic light through a blood sample. It disperses their light sources by different techniques; the simplest one is the use of interference filters in front of broad-band light source. As Interference bandpass filters are relatively inexpensive wavelength selectors. Interference filters that allow transmission of a predetermined wavelength while rejecting or blocking other wavelengths are widely used in instrumentation for clinical chemistry. On the other hand, the lights emitting diodes (LEDs) emits a specified band and have a wide selection options. An economic device based on LEDs (LED based spectrometer) is explained in this work. Instead of the wide spectrum light source and filters (commercial spectrophotometer), The LED based spectrophotometer is calibrated with standard solutions, and its measurement results is compared with the Mindray BS-200 Chemistry Analyzer (commercial spectrophotometer). The comparison shows acceptable results between both spectrophotometers with maximum error 2.33%. The errors can be reduced by applying more fining alignment. Another benefit of the new designee is to minimize testing costs.

An accurate, precise, and affordable light emitting diode spectrophotometer for drinking water and other testing with limited resources

“…Several open source LED spectrophotometers have been developed through robust design processes for potential use in routine laboratories as well as research or teaching [18][19][20][21][22][23][24]. These open source spectrophotometers have been reported to have performance capabilities comparable to those of some commercial spectrophotometers.…”

Ultraviolet Photodissociation Induced by Light‐Emitting Diodes in a Planar Ion Trap

“…LEDs have been integrated into analytical applications and spectrometers, including fluorescence spectroscopy, cost‐efficient and compact UV/Vis spectrophotometers, and capillary electrophoresis and protein fluorescence detection systems for mass spectrometry . Herein, we report the first integration of ultraviolet LEDs with an Orbitrap mass spectrometer to perform UVPD of gas‐phase ions.…”

Development of a Low-cost Colorimetric Measurement Device for Food Component Analysis and Determination of its Performance: A Model Study for Glucose and Protein Assays

“…Bu noktada, dedektör olarak ışıkfrekans dönüştürücülerin kullanılması önemli bir alternatif yaratmaktadır. Literatürde ışık-frekans dönüştürücülerin kullanıldığı çalışmalar sınırlı sayıdadır [7,8]. Yeh ve arkadaşları, timol mavisi, bromkresol yeşili ve fenol kırmızısı gibi indikatörler ile performans testi gerçekleştirmişlerdir [7].…”

“…Yeh ve arkadaşları, timol mavisi, bromkresol yeşili ve fenol kırmızısı gibi indikatörler ile performans testi gerçekleştirmişlerdir [7]. Diğer bir çalışmada ise glukoz analizi yapılarak performans karşılaştırılması yapılmıştır [8]. Performans testi kapsamında dört farklı glukoz derişimi için yüzde hata hesaplanmış ancak analitik olarak önem taşıyan tespit limiti değeri hakkında bilgi verilmemiştir.…”