Search Results (3)

The monitoring of contaminants in imitation jewelry has become important nowadays due to the high amount of products sold worldwide. Due to the complexity of the sample matrix (composed mainly of metals in high concentration), sample analysis can be very challenging. One interesting alternative for this purpose is the use of photochemical vapor generation coupled to inductively coupled plasma optical emission spectrometry (PVG-ICP-OES) due to the ability of separating the analytes from the sample solution prior to analysis; additionally, it is considered an eco-friendly approach if compared to other vapor generation techniques. Thus, this work presents the development and application of a PVG-ICP-OES system for the determination of Hg and Pb in imitation jewelry after sample dissolution in hydrochloric acid. The PVG system was built with two UV lamps (254 nm), a quartz capillary reactor, and a glass gas-liquid separator. Acetic acid concentration and UV exposure time were optimized using a central composite design, as well as the carrier gas flow rate and the radiofrequency (RF) power for the ICP-OES. The optimum conditions were achieved at 30% v/v acetic acid, 60 s reaction time, 0.035 L min⁻¹ carrier gas flow rate, and 1310 W for RF power. The influence of the sample matrix and chemical modifiers were studied, where it was found that the presence of the sample matrix may cause suppression of the analytical signal. The accuracy of the method was evaluated by recovery tests, which ranged from 88 to 102%. The detection limits ranged from 1 to 3 mg g⁻¹, allowing the monitoring of Hg and Pb in imitation jewelry. Full article

This article explores the phenomenon of a specific type of personal adornment worn by members of the Scythian elite in the North Black Sea region in the second half of the 5th century and throughout the 4th century BCE. The discussion juxtaposes the records from 19th-century and early 20th-century excavations with contextual analyses of very recent discoveries from Ukraine, which shed significant new light on the appearance, production, and meaning of Scythian jewelry. The reconstruction of the shape of the jewelry type in question is greatly complicated by two factors: the lack of relevant depictions in the contemporary corpus of Scythian and Greco-Scythian figure scenes and misleading scholarly references to supposed analogies in a Roman-era mosaic, which became the chief reason for the misinterpretations of the ornament’s appearance. Composed of numerous gold or gilded silver tubes; beads; pendants; and, sometimes, “buttons,” this jewelry type is reconstructed in two gender-specific variants in this article: one mesh-like and the other with a cross-chest form. For over a hundred years, scholars have considered only the mesh variant to be the correct reconstruction. As a result, many costume reconstructions of this jewelry form in specialist research and museum displays alike are still proposed without a sufficient evidentiary base. Full article

Among the antiquities of the archaic period of Forest-Steppe Scythia, a group of elite burials of women, possibly endowed with priestly functions during their lifetime, stands out. Until recently, only two unrobbed burial complexes were known to contain the main burials of women of high social rank, in whose graves golden costume elements were found—primarily expressive details of headdresses. The barrows (kurgans) were discovered at the end of the 19th century when amateur excavations were actively carried out on the right bank of the Dnipro. As a result of research conducted by the author at the Skorobir necropolis (in the area of the Bilsk fortified settlement, on the left bank of the Dnipro), two similar graves were recently discovered, which provided new material that significantly expanded the known geographical distribution of this phenomenon. The materials are closely analogous to the previously discovered elite female burials of the Middle Dnipro (barrow 100 near the village of Syniavka, barrow 35 near the village of Bobrytsa) and allow us to highlight a number of stable elements of the funeral costume of noble women and the sets of objects that complemented them. In this article, we consider the social and cultural significance of female attire in elite burials and delimit the chronological framework of this previously understudied phenomenon within the first half of the 6th century BCE. The new finds offer unprecedented insight into the form and meaning of one type of female headdress which researchers have tried to reconstruct for over a century. Full article