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The WHO annually reports an increasing abuse of new psychoactive substances (NPS), which are a heterogeneous group of synthetic drugs and are consumed as substitute for controlled drugs of abuse. In this work, we focused on highly potent derivatives such those of phenethylamine (2C), N-2-methoxybenzyl phenethylamine (NBOMes), lysergic acid diethylamide (LSD), and fentanyl. Severe to fatal intoxications were described due to their high potency. Therefore, they have to be taken at very low doses resulting in low blood concentration in the low ng/mL range, which is a challenge for reliable analytical detection and quantification. The aim of this work was therefore to design a simple, robust, and fast method for simultaneous detection and quantification of multiple substances of the different classes in human blood plasma using liquid chromatography (LC) high resolution (HR) mass spectrometry (MS) with alternating HR full-scan (HRFS) MS and "All-ions fragmentation" (AIF) MS. The paper contains results of the method validation according to the EMA guideline, including intra-/interday accuracy and precision, matrix effects, storage and benchtop analyte stability as well as selectivity and carryover. All validation criteria were fulfilled for most tested compounds except for the NBOMe derivatives, one out of ten 2C-derivatives and butyryl fentanyl, which failed at accuracy and/or precision or at the acceptance criteria for matrix effect. Reasons for this are discussed and solutions presented. Despite some limitations, the HRFS + AIFMS analysis allowed detection of most of the analytes down to 0.1ng/mL, seamless integration of new or unexpected analytes, identification and quantification with no limitations on the number of monitored compounds, and reevaluation of the acquired data also concerning metabolism studies using group-indicating fragment ions.
This article was published in the following journal.
Renalase is a recently discovered kidney secretory protein, which is considered as an important component involved in blood pressure regulation. Although altered levels of renalase have been detected ...
Edoxaban was extracted from human plasma by simple protein precipitation with acetonitrile, followed by quantitative determination using a liquid chromatography-mass spectrometry method. The recoverie...
Surface fouling from coagulated blood is a major challenge in medical industry. However, the wetting physics and dynamics of blood on surfaces are not well understood nor are the quantitative influenc...
Over the last two decades, EDTA-plasma has been used as the preferred sample matrix for human blood proteomic profiling. Serum has also been employed widely. Only a few studies have assessed the diffe...
When developing a quantitative assay for exogenous or endogenous compounds, guidelines for method validation normally recommend that the biological specimens should be prepared in corresponding authen...
The purpose of this study is to find blood plasma based biomarkers of disease progression in neurofibromatosis type 1 (NF1). NF1 is associated with the development of benign cutaneous tumo...
Epstein-Barr virus (EBV) is one of several herpesviruses that cause disease in humans. EBV virus has an oncogenic potential, and it has been associated with the development of a wide range...
The aim of this study is to investigate whether patients with anorexia nervosa have elevated plasma cholesterol levels and, if elevated plasma cholesterol levels influence drug transport b...
Opioids are commonly prescribed for surgical patients to treat moderate to severe pain after surgery. However, opioids can be associated with serious complications such as respiratory depr...
The purpose of this study is to determine the extent to which analgesic tolerance develops in chronic pain patients who are either started on opioids or who receive an increase in pre-stud...
The amount of PLASMA that perfuses the KIDNEYS per unit time, approximately 10% greater than effective renal plasma flow (RENAL PLASMA FLOW, EFFECTIVE). It should be differentiated from the RENAL BLOOD FLOW; (RBF), which refers to the total volume of BLOOD flowing through the renal vasculature, while the renal plasma flow refers to the rate of plasma flow (RPF).
Locations, on the GENOME, of GENES or other genetic elements that encode or control the expression of a quantitative trait (QUANTITATIVE TRAIT, HERITABLE).
Any liquid used to replace blood plasma, usually a saline solution, often with serum albumins, dextrans or other preparations. These substances do not enhance the oxygen- carrying capacity of blood, but merely replace the volume. They are also used to treat dehydration.
The body fluid that circulates in the vascular system (BLOOD VESSELS). Whole blood includes PLASMA and BLOOD CELLS.
Method in which repeated blood pressure readings are made while the patient undergoes normal daily activities. It allows quantitative analysis of the high blood pressure load over time, can help distinguish between types of HYPERTENSION, and can assess the effectiveness of antihypertensive therapy.
Blood is a specialized bodily fluid that delivers necessary substances to the body's cells (in animals) – such as nutrients and oxygen – and transports waste products away from those same cells. In vertebrates, it is composed of blo...