Behind the Shield: Documenting Interventions in a Bolognese Missal with Scanning Macro-X-Ray Fluorescence (MA-XRF) Spectroscopy

2021 ◽  
Vol 13 ◽  
pp. 63-86
Author(s):  
Nancy K. Turner ◽  
Catherine M. Schmidt Patterson ◽  
Bryan C. Keene
Keyword(s):  
X Ray ◽  
Xrf Spectroscopy

In situ XRF analysis of Cs adsorption by the precipitation bands of Prussian blue analogues formed in agarose gels

2019 ◽  
Vol 34 (5) ◽  
pp. 979-985 ◽  
Author(s):  
Hisashi Hayashi ◽  
Yui Sato ◽  
Saya Aoki ◽  
Mao Takaishi
Keyword(s):  
Prussian Blue ◽  
Agarose Gel ◽  
X Ray ◽  
Agarose Gels ◽  
Xrf Analysis ◽  
Prussian Blue Analogues ◽  
Xrf Spectroscopy

The measurement of Cs adsorption by the precipitation bands of Mn-based Prussian blue analogues (PBAs), Co-based PBAs, and Prussian blue (PB), which were spontaneously formed in agarose gel, was carried out using in situ X-ray fluorescence (XRF) spectroscopy.

XRF of cultural heritage materials: Round-robin IV—paint on canvas

2009 ◽  
Vol 24 (2) ◽  
pp. 124-129 ◽  
Author(s):  
C. Namowicz ◽  
K. Trentelman ◽  
C. McGlinchey
Keyword(s):  
Cultural Heritage ◽  
Round Robin ◽  
X Ray ◽  
Xrf Analysis ◽  
Works Of Art ◽  
Working Practices ◽  
Xrf Spectroscopy ◽  
Representative Samples ◽  
Shielding Effects

To establish standard working practices and further understanding of the application of X-ray fluorescence (XRF) spectroscopy to works of art and cultural heritage materials, a series of round-robin tests have been conducted biannually since 2002. In 2008 the round-robin explored the application of XRF to the study of paintings on canvas. Thirteen samples, consisting of both modern and traditional pigments on canvas, were distributed to 25 participating institutions for analysis. The samples were designed to explore common challenges encountered in the XRF analysis of painted works including peak overlaps, sum peaks, layering/shielding effects, detection of low-Z pigments, and modern pigments. The results from representative samples highlighting each topic are discussed.

scholarly journals Feasibility study on the use of elemental profiles to authenticate aromatic rice: the case of Basmati and Thai rice

2021 ◽  
Author(s):  
Catalina Dumitrascu ◽  
Yiannis Fiamegos ◽  
Maria Beatriz de la Calle Guntiñas
Keyword(s):  
Partial Least Square ◽  
Least Square ◽  
Correct Classification ◽  
Aromatic Rice ◽  
Rice Varieties ◽  
X Ray ◽  
Mass Fractions ◽  
Rice Samples ◽  
Xrf Spectroscopy ◽  
Cu And Zn

AbstractAmong the thousands of existing rice varieties, aromatic rice has increasingly attracted consumer’s preference in recent years. Within aromatic rice, Basmati, cultivated in some regions in Pakistan and India, is highly demanded. Other aromatic rice, cultivated in specific regions, for instance in Thailand (commonly referred to as Jasmine Thai rice), are also highly appreciated by consumers. In this work, the elemental profiles of commercially available rice samples (17 Basmati, 11 Thai, and 7 Long Grain rice) were determined by energy-dispersive X-ray fluorescence (ED-XRF) spectroscopy. The mass fractions of P, Cl, S, K, Fe, Cu, and Zn were significantly different (95% confidence interval) between Basmati and Thai rice and between Thai and Long Grain rice; only Cl, S, and Zn were significantly different between Basmati and Long Grain rice. Multivariate evaluation of the results combining soft independent modelling by class analogy (SIMCA) and partial least square discriminant analysis (PLS-DA) allowed the correct classification (true positives) of 94.1, 85.6, and 100% of the Basmati, Long Grain, and Thai rice, respectively. The specificity (true negatives) of Basmati, Long Grain, and Thai was 94.4, 82.1, and 100%, respectively.

scholarly journals Preventing the Sale of Fraudulent Gemstones using Non-Destructive X-Ray Fluoresence Spectroscopy

2009 ◽  
Vol 17 (1) ◽  
pp. 52-55
Author(s):  
Mary S. Goldman ◽  
Dan L. Davis ◽  
Robert H. Clifford
Keyword(s):  
Chemical Composition ◽  
Significant Role ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
X Ray ◽  
Naked Eye ◽  
The World ◽  
Non Destructive ◽  
Ideal Technique ◽  
Xrf Spectroscopy

As the old adage goes, beauty is in the eye of the beholder. Ultimately, in the world of jewelry, the unwitting buyer uses his or her naked eye to decide which baubles are the most beautiful and worthy of wear. The expert jeweler and gemologist, however, know that each gem is subjected to rigorous scientific examinations and standards to determine its value and authenticity.As the number of methods for altering gems grows with technology, methods to counteract counterfeiters, who can take a worthless stone and alter it to make it appear like a more expensive gem, are essential to gem buyers and traders. They must be able to detect artificial stones.Gemologists assess gemstones based on several standards such as chemical composition and purity. Chemical composition plays a significant role in evaluating gems, as two of the same gemstone can differ chemically. One of the most well known methods of non-destructive testing for detecting gem quality is X-ray fluorescence (XRF) spectroscopy. Increasingly in demand, XRF spectroscopy is an ideal technique for fighting the battle against fraud.

scholarly journals Assessment of the Carbonate Rocks of the Pila Spi Formation for Cement Industry, in Permam Mountain, Erbil, Iraqi Kurdistan Region

2019 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Varoujan K. Sissakian ◽  
Dalyia A. Hamoodi ◽  
Hassan O. Omer ◽  
Sazan A. Nyazi
Keyword(s):  
Sampling Interval ◽  
Cement Industry ◽  
Chemical Compositions ◽  
Dolomitic Limestone ◽  
Total Thickness ◽  
Kurdistan Region ◽  
X Ray ◽  
Mixing Ratios ◽  
Iraqi Kurdistan ◽  
Xrf Spectroscopy

The Pila Spi Formation is exposed in Permam Mountain forming its carapace, and continuous ridges for few hundreds of kilometers. The rocks of the formation are mainly dolomitic limestone, dolomite, and limestone with various proportions. The thickness of the formation in Permam Mountain is about 100 m. Nine samples are collected from the Pila Spi Formation along a recently road cut across Permam Mountain. The sampling interval varies from 10 to 15 m. The collected samples were subjected to X-ray fluorescence (XRF) spectroscopy test to indicate the percentages of the main oxides in the samples. The results showed that the chemical composition of samples No. 1 and 9 meet the Iraqi standards for cement industry, whereas the remaining samples (Nos. 2–8) do not meet the Iraqi standards, and their total thickness is 80 m. To evaluate the suitability of the exposed rocks for cement industry in the sampled section within the Pila Spi Formation, different ratios of sample No. 1 were mixed with different ratios of a sample called sample No. A, it represents a mixture of samples No. 2–8. The mixing ratios are: (Sample No. 1/sample No. A) 50/50, 60/40, 70/30, 80/20, and 90/10. The same procedure was repeated for Sample No. 9. Another attempt was performed by mixing equal ratios of samples Nos. 1 and 9 with the same performed ratios with sample No. A.The chemical compositions of the samples were indicated using XRF test. The results showed that the best mixing ratios for the cement industry are 90:10, 80:20, and 70: 30 (samples Nos. 1+9: sample No. A).

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