Development of a Pencil Drawn Paper-based Analytical Device to Detect Lysergic Acid Diethylamide (LSD)*†

The need for agile and proper identification of drugs of abuse has encouraged the scientific community to improve and to develop new methodologies. The drug lysergic acid diethylamide (LSD) is still widely used due to its hallucinogenic effects. The use of voltammetric methods to analyze narcotics has increased in recent years, and the possibility of miniaturizing the electrochemical equipment allows these methods to be applied outside the laboratory; for example, in crime scenes. In addition to portability, the search for affordable and sustainable materials for use in electroanalytical research has grown in recent decades. In this context, employing paper substrate, graphite pencil, and silver paint to construct paper-based electrodes is a great alternative. Here, a paper-based device comprising three electrodes was drawn on 300 g/m² watercolor paper with 8B pencils, and its efficiency was compared to the efficiency of a commercially available screen-printed carbon electrode. Square wave voltammetry was used for LSD analysis in aqueous medium containing 0.05 mol/L LiClO₄. The limits of detection and quantification were 0.38 and 1.27 μmol/L, respectively. Both electrodes exhibited a similar voltammetric response, which was also confirmed during analysis of a seized LSD sample, with recovery of less than 10%. The seized samples were previously analyzed by GCMS technique, employing the full scan spectra against the software spectral library. The electrode selectivity was also tested against 3,4-methylenedioxymethamphetamine (MDMA) and methamphetamine. It was possible to differentiate these compounds from LSD, indicating that the developed paper-based device has potential application in forensic chemistry analyses.     

The Prosecution Service Function within the Spanish Criminal Justice System

The national criminal justice system of Spain is described. Special attention is paid to the function of the Public Prosecution Services within this framework and its relationship to police and courts. The article not only refers to legal provisions but to the factual handling of criminal cases as well.     

Voltammetric determination of Δ9-THC in glassy carbon electrode: An important contribution to forensic electroanalysis

Teeth are recently drawing attention for their potential as biological modeling investigation samples due to their ability to be collected and their slow substance metabolism. There is no active metabolism of elements after the completion of dentin. Dentin is surrounded by enamel and cementum, and is not affected by the oral environment. Therefore, the amount of trace elements in dentin may change with age, and this is considered to be a reliable biological load index. The objectives in this study are to demonstrate concentrations of elements in the dentin of healthy Japanese subjects by sex and age, and to reveal the relationship between element levels and age. 121 healthy teeth samples were extracted due to periodontal disease or orthodontic treatment. Each tooth was sliced from the crown to the root apex into 0.5-1mm thickness, then enamel, cementum, and the pulp were removed; the dentins were used as samples. The concentration of 10 trace elements (B, Mn, Co, Cu, Zn, Rb, Sr, Mo, Cd, and Pb) in the dentin was measured using inductively coupled plasma mass spectrometer (ICP-MS). The differences Co and Pb in the dentin between men and women were significant (p<0.01). Significant positive correlation was observed between B, Co, Cu, Zn, Sr and Pb concentrations in the dentin and age (p<0.001). The results of the present study suggest that human dentin is an appropriate substance for relativity with sex and age at further future research.     

When the Line is Crossed... Paths to Control and Sanction Behaviour Necessitating a State Reaction

This article provides an overview of the various forms of proceedings available within 11 European criminal justice systems and reflects upon their core features. It also provides a picture of how far alternative, non-criminal proceedings are used by some of the systems as a different path to imposing a state reaction upon wrong-doers.     

SURROGACY IN JAPAN: LEGAL IMPLICATIONS FOR PARENTAGE AND CITIZENSHIP

Japan has not yet regulated assisted reproductive technology by law. This lack of rules and regulations leaves to the courts the solution of numerous controversies, and puts patients in a situation of considerable uncertainty about their rights. First, the article uses a Supreme Court case on foreign surrogacy to discuss how courts should decide when there is a conflict between existing laws and the best interest of the child. Then, after describing the current situation and trends of surrogacy in Japan, the article examines a potential problem of coherence in prohibiting surrogacy and at the same time allowing adoption by the intended parents.     

Voltammetric analysis of luminescent markers in gunshot residues

Currently, SEM-EDS is used to detect gunshot residue (GSR) from the presence of Ba, Pb, and Sb in the sample. However, the development of new nontoxic ammunition (NTA) has prevented conventional metals from being found. In this work, we aim to determine the presence of an inorganic luminescent chemical marker based on rare earth in gunshot residues using the technique of squarewave voltammetry (SWV). After firing, the luminescent complex [(Eu₂Zr)(btc)₃(Hbtc)_0.5.6H₂O], which is used as a chemical marker, can be detected under a UV lamp. An aqueous solution with 0.1 mol L⁻¹ KCl as supporting electrolyte can be easily collected on carbon paste electrode surfaces for SWV analysis A = 100 mV, f = 10 Hz, and step potential of 5 mV are required. The luminescent marker incorporated into the carbon paste electrode showed two anodic peak currents in the region of 0.4 V (vs Ag/AgCl) and at 0.75 V (vs Ag/AgCl) and also a cathodic one in 0.4 V (vs Ag/AgCl). SEM-EDS was able to analyze the same voltammetric results for conventional and nontoxic ammunition containing the luminescent marker. Therefore, voltammetry and SEM-EDS are valid for detecting the new residue marker in GSR. Despite this, the electrochemical method is still more advantageous because of its low cost and lack of expensive equipment and supplies in forensic laboratories.     

New perspectives on crime,violence and insecurity in Latin America

This article introduces a Crime, Law & Social Change special issue on rethinking organised crime, collective violence and insecurity in contemporary Latin America. The five contributions, which among them cover the cases of Argentina, Brazil, Colombia, Guatemala and Mexico, address the puzzle of why and how in the midst of the world’s most serious crime and violence crisis ‘stability’ and ‘political order’ are nonetheless maintained. Taking a critical distance to conventional scholarship on these problems, the present collection of papers shifts the focus from one on how democratic regimes and formal institutions of the state are affected to a broader one that puts the spotlight on the ‘real politics’ and ‘real governance’ of crime and violence in the region. Cultural aspects of the ‘collapse of legality’, the holding power of informal institutions and the workings of ‘crimilegal orders’ and ‘criminalized electoral politics’ are explored through variegated conceptual and methodological approaches drawn from political science, criminology, sociology, social psychology, cultural studies and investigative journalism.