@sasspectroscopy
www.s-a-s.org The Society for Applied Spectroscopy is a nonprofit organization formed to advance and disseminate knowledge and information concerning the art and science of spectroscopy.
🔬 It’s the final day of @pittcon.bsky.social 2026!
Thank you to everyone who connected with SAS this week. We look forward to seeing you in Pittsburgh, PA next year!
#SAS #Spectroscopy #Pittcon #AnalyticalScience
Abstract: Soil reflectance spectroscopy is a powerful tool for rapid, non-destructive assessment of soil properties and the foundation for data-driven soil science applications. However, systematic discrepancies during routine spectral measurement procedures, particularly those arising from contamination or deterioration of white reference (WR) calibration panels, may compromise spectral data stability and hinder harmonization practices across laboratories. This study investigates the impact of using a non-contaminated WR panel as a calibration target to measure soil reflectance across the visible (Vis), near-infrared (NIR), and short-wavelength infrared (SWIR) spectral regions. The study evaluates the effectiveness of an internal soil standard (ISS) Lucky Bay sand to correct discrepancies within a controlled laboratory setting. Twelve soils from the Israeli Legacy Soil Spectral Library were analyzed using a contact-probe setup that was calibrated with both a clean and a contaminated WR. The spectral correction method, based on IEEE P4005 protocols and the ISS calibration, significantly reduced spectral inconsistencies, especially in the Vis region where contamination effects were most pronounced. Results show that the ISS effectively harmonized spectra acquired under different WR conditions, reducing the modified average spectral difference stability (mASDS) measure across all samples. While ISS correction is commonly employed for cross-laboratory harmonization, our findings highlight its critical role in enhancing intra-laboratory consistency under routine operational variability. We recommend that every WR calibration process will be accompanied with ISS measurements. The continuous use of a well-maintained WR and ISS improves the reliability of soil spectral datasets and supports the long-term harmonization of soil spectral libraries.
New from Applied Spectroscopy!
Mitigating Spectral Errors from White Reference Degradation in Soil Spectroscopy
Read more: https://doi.org/10.1177/00037028251396975
#SAS #Spectroscopy #NIR #SWIR #reflectance $soil
your research, and connect with the community.
🏆 Top 4 presenters receive travel support to SciX
📝 Register by March 20: bit.ly/4rdQVnN
Hosted by the Coblentz Society and the Society for Applied Spectroscopy (SAS).
#SAS #Spectroscopy #SLAM2026 #StudentsInScience #EarlyCareer #SciX
🎙️ Ready to take the spotlight? Join us for the Fourth Virtual Student/Early Career SLAM 2026 on April 9 at 12 PM (ET)!
This high-energy virtual event invites students and early-career researchers to present their work in a concise, 3-minute format. It’s a great way to refine your message, showcase
Find more info here: bit.ly/4qUefWr
#SAS #Spectroscopy #Pittcon #EarlyCareer #Networking
“So Many Opportunities – Demystifying Career Paths for Early Career Spectroscopists.”
Hear panelists share their career journeys, followed by open discussion & Q&A. A great chance to explore new directions and connect with professionals in the field!
🔬 Pittcon 2026 is in full swing!
If you’re attending, stop by the SAS booth to say hello and connect with fellow spectroscopists—we’d love to see you!
🎓 Early Career attendees: Join the ECIG networking roundtable today, Monday, March 9 | 1:30–3:00 PM | Room 006D
Abstract: A small remote Raman sensor was used to measure the Raman scattering signal from clear, still water as a function of water depth (12 cm and 396 cm depth), sensor distance above the water surface (20–300 cm), and angle of incidence (0–80°) to the normal of the water surface. Under thick- and thin-sample conditions, the signal depends on either the inverse, or the inverse square, of sensor distance from the water surface, respectively. A model is derived that fits data for different sensor distances, water depths, and angles of incidence. Fits to the measured data are consistent with the known intensity of water Raman scattering and the specifications of the detection system. This manuscript provides a mathematical model that can be used to predict and evaluate the performance of remote sensors and can be expanded to account for differing experimental conditions.
New from Applied Spectroscopy!
Pathlength, Altitude and Angle of Incidence Dependence of Remote Water Raman Scattering
Read more: https://doi.org/10.1177/00037028251394346
#SAS #Spectroscopy #Remote #water #Raman #Scattering
• Michael George – Non-invasive spectroscopy & advanced PAT/flow chemistry
• John Wasylyk – Spectroscopy aligned with Green Chemistry principles
👉 Learn more: pittcon.org/
#SAS #Spectroscopy #Pittcon #Sustainability
• Rohith Reddy – MIRSI + AI for label-free tissue diagnostics
• Carson Roberts – UAV hyperspectral & LiDAR crop monitoring challenges
• Luisa Profeta – Portable spectroscopy for CBRNE applications
• Hannah Schorr – Automated NIR solvent analysis systems
🔬 Pittcon starts tomorrow! SAS is excited to be part of Pittcon 2026—stop by and connect with us!
Don’t miss the SAS-sponsored session “Spectroscopy and Sustainability: A Perfect Match.” Highlights include:
• Lyufei Chen – A-TEEM® spectroscopy for rapid, data-rich protein & chemical analysis
Abstract: Chromosome characterization is crucial in cytogenetic research and diagnostics, necessitating precise imaging methods to ensure proper analyses. The aim of this project is to identify a reliable method for chromosomal characterization that uses hyperspectral imagery of stained metaphase chromosomes using bright-field microscopy. We analyzed four hyperspectral images of stained chromosomes acquired under bright-field illumination. To address the high dimensionality of the hyperspectral hypercubes, we applied five dimension reduction algorithms based on spectral band selection to determine the most effective approach. A comparative study was conducted between five band selection methods to assess their effectiveness in chromosome characterization. The results indicate that sparse subspace clustering and multi-objective band selection are the most effective methods, outperforming the others in reducing the spectral dimensionality of the hyperspectral data, while preserving key properties essential for accurate chromosomes characterization. This study demonstrates that careful selection of spectral bands can enhance the analysis of spectral hypercubes for chromosome characterization.
New from Applied Spectroscopy!
Exploring Band Selection Methods for Enhanced Chromosomal Analysis in Hyperspectral Imaging
Read more: https://doi.org/10.1177/00037028251403574
#SAS #Spectroscopy #Hyperspectral #Band #Selection #Chromosomal #Analysis
support + a 2-year SAS membership.
📄 Submit to: info@iasa.world #IASA #Spectroscopy #StudentAwards #SciX2026 #SAS
🎓 Last call! Nominations for the 2026 IASA Student Award close tomorrow, March 6.
Recognize an exceptional student in atomic spectroscopy—awardees present at SciX 2026 and receive travel
to share with colleagues and friends!
👉 Register here: bit.ly/4qYwlH6
#SAS #Spectroscopy #TourSpeakerSeries #AppliedSpectroscopy
Join us March 19, 2026 from 12–1 PM EDT for our first Tour Presentation of the year featuring Professor Mary Kate Donais, presenting “Spectroscopic Characterization of Historic Fabrics and Fibers.”
This fascinating look at spectroscopy and cultural heritage is one you won’t want to miss—be sure
Abstract: In attenuated total reflection (ATR) spectroscopy, the presence of an evanescent field penetrating the sample is generally considered crucial. However, according to wave optics, this evanescent field vanishes when the rarer medium is absorbing, and the attenuation of total reflection results from transmission into this medium. While the evanescent field may not play a significant role in this scenario, a closer examination of the relevant relationships reveals that the system's properties vary smoothly with both the angle of incidence and the imaginary part of the dielectric function. This effect can be further illustrated by comparing electric field maps and spectra for semi-infinite rarer media with those for rarer media composed of layers with thicknesses on the order of the wavelength. In the latter case, ATR spectra can be recorded well below the critical angle, where no evanescent field exists. If the layer is vacuum and the underlying semi-infinite medium is assumed to have the same refractive index but is weakly absorbing, tunneling and frustrated total reflection can be observed. Reflecting on our results, we can now define the critical angle in the presence of absorption as the point at which the real and imaginary parts of the perpendicular component of the wavevector become equal. Overall, we conclude that evanescent waves play little to no significant role. Any deviation from total reflection can be attributed to transmission through the ATR crystal-medium interface.
New from Applied Spectroscopy!
Understanding the Role of the Evanescent Field in Attenuated Total Reflection (ATR) Spectroscopy
Read more: https://doi.org/10.1177/00037028251358400
#SAS #Spectroscopy #ATR #evanescent #field #absorption
🎓 Deadline approaching! Nominations for the 2026 IASA Student Award are due March 6. Outstanding undergrad & grad students in atomic spectroscopy can present at SciX 2026 and receive ≥$500 travel support + a 2-year SAS membership. Submit: info@iasa.world
#IASA #Spectroscopy #SciX2026
material synthesis, CBRNE identification, and even extraterrestrial studies.
pittcon.org
#SAS #Spectroscopy #Pittcon #Sustainability #AnalyticalScience
“Spectroscopy and Sustainability: A Perfect Match.” Building on the ACS Green Chemistry Initiative, this session highlights how spectroscopy is advancing sustainability across biomedical research, pharmaceuticals, UAV crop monitoring, hazardous
🔬 Pittcon is just a few days away!
We’re excited to connect with the spectroscopy community March 7–11—be sure to stop by the SAS booth to say hello!
On the opening morning of conference sessions, don’t miss the SAS-sponsored session,
Abstract: Laser-induced breakdown spectroscopy (LIBS) offers a promising alternative due to its minimal sample preparation, real-time analysis capabilities, and versatility in analyzing a broad range of materials. However, the challenge lies in determining its ability to effectively distinguish high-iron ore content from mineralogically similar ores with lower iron content. This study focuses on differentiating iron ore from a variety of ores with lower iron content, including calcite, biotite, dolomite, chalcopyrite, rutile, chromite, olivine, limonite, and astrophyllite, using LIBS. By comparing the obtained spectra and applying receiver operating characteristic (ROC) curve analysis, the study assesses the specificity of the technique. The results demonstrate a high specificity (>70%) in distinguishing iron ore from biotite, dolomite, chalcopyrite, rutile, olivine, and astrophyllite, revealing the potential of LIBS for effectively identifying iron ore from some ore types. However, when comparing iron ore to other ore types, such as limonite, chromite, and calcite, the results are not statistically significant. This means that the spectral or compositional similarities between these ores may limit the method's capacity to give clear separation in certain situations. To further validate the results, two common classification models, principal component analysis followed by linear discriminant analysis (PCA + LDA) and k-nearest neighbors (KNN) were applied to the spectral data. The comparison results demonstrate the resilience of LIBS classification and the impact of mineral matrix influences on diagnostic performance.
New from Applied Spectroscopy!
Analysis of Specificity and Limitations Applying the Receiver Operating Characteristic Curve and Laser-Induced Breakdown Spectroscopy for Differentiating Iron Ore
Read more: https://doi.org/10.1177/00037028251396585
#SAS #Spectroscopy #LIBS #iron #ore #classification
🌍 SAS at Pittcon (March 7–11)! Don’t miss the SAS-sponsored session “Spectroscopy and Sustainability,” exploring how spectroscopy advances sustainable and responsible science. Add it to your schedule! Details: https://bit.ly/4qF7ZTg
#SAS #Spectroscopy #Pittcon
🎤 Register for the Fourth Virtual Student/Early Career SLAM 2026! Join us April 9 at 12 PM ET for 3-minute elevator-style talks by students & early-career researchers. Top 4 presenters earn travel support to SciX.
📝 Register by March 20: https://bit.ly/4rdQVnN
#SAS #Spectroscopy #SLAM2026 #SciX
🎓 2026 SAS Student Awards are open! Apply by March 31 for the Barbara Stull Graduate Student Award or the Undergraduate Award in Applied Spectroscopy.
👉 Graduate: https://bit.ly/4tlPsgr
👉 Undergraduate: https://bit.ly/4axF4ee
🔬 Catch SAS at Pittcon 2026, March 7–11! Discover emerging technologies, hear from leaders, and connect with the global spectroscopy community. Learn more: https://loom.ly/Zkx4CPY
#SAS #Spectroscopy #Pittcon
⏰ Reminder: Nominations for the 2026 SAS Gold Medal Award are due Feb 27! The NY/NJ Section of SAS recognizes exceptional contributions to applied spectroscopy. Award presented at EAS 2026 (Nov 16–18, Plainsboro, NJ). Apply: https://bit.ly/49WjG0M
#SAS #Spectroscopy #Awards #EAS
The New York / New Jersey Section of the Society for Applied Spectroscopy will hold an invited seminar ‼️THIS THURSDAY‼️ February 19th at 12pm EST.
Click the link to read the abstract and speaker bio: https://loom.ly/fWKWELQ
Zoom link: https://loom.ly/qsO2u-o
🎓 Call for Nominations: 2026 IASA Student Award! Recognizing outstanding undergrad & grad students in atomic spectroscopy. Award includes an oral talk at SciX 2026, ≥$500 travel support & a 2-year SAS membership. ⏰ Deadline: March 6. Submit to info@iasa.world
#IASA #Spectroscopy #SciX2026
Happy Presidents' Day to our friends in the US! Just a reminder, our offices are closed today.