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List of works by Ilkka Ojanperä

A fatal doxepin poisoning associated with a defective CYP2D6 genotype

scientific article published in September 2007

A general screening method for doping agents in human urine by solid phase extraction and liquid chromatography/time-of-flight mass spectrometry

scientific article

A high-sensitivity ultra-high performance liquid chromatography/high-resolution time-of-flight mass spectrometry (UHPLC-HR-TOFMS) method for screening synthetic cannabinoids and other drugs of abuse in urine

scientific article

A rare case of serial killing by poisoning

scientific article published on 24 April 2013

Absorption of different oral dosage forms of oxycodone in the elderly: a cross-over clinical trial in patients undergoing cystoscopy

scientific article

Adverse interaction of warfarin and paracetamol: evidence from a post-mortem study

scientific article published on 25 September 2009

Alcohol and benzodiazepines in fatal poisonings

scientific article published in July 2002

An epidemic of fatal 3-methylfentanyl poisoning in Estonia

scientific article

Analgesic concentrations of oxycodone--a prospective clinical PK/PD study in patients with laparoscopic cholecystectomy

scientific article

Analysis of street drugs in seized material without primary reference standards

scientific article

Application of electrospray ionization product ion spectra for identification with atmospheric pressure matrix-assisted laser desorption/ionization mass spectrometry - a case study with seized drugs

scientific article

Benzodiazepines and alcohol are associated with cases of fatal buprenorphine poisoning

scientific article published on 17 September 2011

Blood levels of 3-methylfentanyl in 3 fatal poisoning cases

scientific article published in December 2006

Broad-spectrum drug screening of meconium by liquid chromatography with tandem mass spectrometry and time-of-flight mass spectrometry

scientific article published on 9 July 2010

CYP2D6 and CYP2C19 genotypes and amitriptyline metabolite ratios in a series of medicolegal autopsies

scientific article published on 15 July 2005

Combined drug screening and confirmation by liquid chromatography time-of-flight mass spectrometry with reverse database search

scientific article published on 13 March 2012

Comparison between drug screening by immunoassay and ultra-high performance liquid chromatography/high-resolution time-of-flight mass spectrometry in post-mortem urine

scientific article published on 20 June 2014

Comparison of Post-targeted and Pre-targeted Urine Drug Screening by UHPLC-HR-QTOFMS.

scientific article published in September 2017

Comparison of breath-alcohol screening test results with venous blood alcohol concentration in suspected drunken drivers

scientific article published on 26 March 2014

Comparison of fatal poisonings by prescription opioids

scientific article

Comparison of product ion spectra obtained by liquid chromatography/triple-quadrupole mass spectrometry for library search

scientific article

Compensation of Matrix Effects in a Standard Addition Method for Metformin in Postmortem Blood Using Liquid Chromatography-Electrospray-Tandem Mass Spectrometry

article

Completed suicides of citalopram users-the role of CYP genotypes and adverse drug interactions

scientific article published on 01 September 2018

Concurrent estimation of metabolite concentrations along with parent drug quantification in post-mortem blood

scientific article

Corrigendum to “Quantitative estimation of a-PVP metabolites in urine by GC-APCI-QTOFMS with nitrogen chemiluminescence detection based on parent drug calibration” [Forensic Sci. Int. 286 (2018) 12–17]

scientific article published on 23 May 2018

Current use of high-resolution mass spectrometry in drug screening relevant to clinical and forensic toxicology and doping control

scientific article

Death following ingestion of MDMA (ecstasy) and moclobemide

scientific article

Development of a GC-APCI-QTOFMS library for new psychoactive substances and comparison to a commercial ESI library

scientific article published on 22 December 2016

Diazepam-induced neuronal plasticity attenuates locomotor responses to morphine and amphetamine challenges in mice.

scientific article published on 18 July 2011

Differentiation of structural isomers in a target drug database by LC/Q-TOFMS using fragmentation prediction

scientific article

Does coronary artery bypass surgery affect metoprolol bioavailability

scientific article published on 28 February 2007

Drug concentrations in post-mortem femoral blood compared with therapeutic concentrations in plasma

scientific article

Drugs related to motor vehicle crashes in northern European countries: A study of fatally injured drivers

scientific article published on 28 May 2011

Elevated formic acid concentrations in putrefied post-mortem blood and urine samples.

scientific article published on 26 November 2010

Enzymatic assay for urine lactose in the assessment of recent intravenous abuse of buprenorphine

scientific article published on 23 June 2019

Enzymatic assays for detecting lactose and sucrose in urine to reveal intravenous drug abuse with emphasis on buprenorphine

scientific article published on 02 September 2016

Ethylene Glycol and Metabolite Concentrations in Fatal Ethylene Glycol Poisonings.

scientific article

Evaluation of a high resolving power time-of-flight mass spectrometer for drug analysis in terms of resolving power and acquisition rate

scientific article published on 27 January 2011

Fatal iatrogenic BaSO4 embolism: morphological and ultrastructural findings confirmed by X-ray microanalysis and ICP-AES.

scientific article published on 5 February 2007

Fatal poisoning in drug addicts in the Nordic countries in 2012.

scientific article published on 13 January 2015

Fatal poisonings in Finland during the years 2004-2009.

scientific article

Fatal toxicity index of medicinal drugs based on a comprehensive toxicology database.

scientific article

Fatal venlafaxine poisonings are associated with a high prevalence of drug interactions

scientific article published on 30 April 2010

Headspace in-tube extraction gas chromatography-mass spectrometry for the analysis of hydroxylic methyl-derivatized and volatile organic compounds in blood and urine

scientific article published in April 2010

High buprenorphine-related mortality is persistent in Finland

scientific article published on 17 August 2018

How do different extracorporeal circulation systems affect metoprolol bioavailability in coronary artery bypass surgery patients.

scientific article published on 9 March 2018

Hydrophilic interaction liquid chromatography and accurate mass measurement for quantification and confirmation of morphine, codeine and their glucuronide conjugates in human urine

scientific article published on 9 September 2010

In silico and in vitro metabolism studies support identification of designer drugs in human urine by liquid chromatography/quadrupole-time-of-flight mass spectrometry

scientific article published on 01 August 2013

In silico methods for predicting metabolism and mass fragmentation applied to quetiapine in liquid chromatography/time-of-flight mass spectrometry urine drug screening

scientific article

Increase in drugs-of-abuse findings in post-mortem toxicology due to COVID-19 restrictions - first observations in Finland

scientific article published on 20 November 2020

Interaction of alcohol and drugs in fatal poisonings

scientific article

Isotopic pattern and accurate mass determination in urine drug screening by liquid chromatography/time-of-flight mass spectrometry

scientific article

Keto amphetamine toxicity-focus on the redox reactivity of the cathinone designer drug mephedrone.

scientific article

Long-term cognitive and neurochemical effects of "bath salt" designer drugs methylone and mephedrone.

scientific article published on 22 October 2012

Manganese-enhanced magnetic resonance imaging reveals differential long-term neuroadaptation after methamphetamine and the substituted cathinone 4-methylmethcathinone (mephedrone).

scientific article published on 7 December 2014

Matrix effect in the analysis of drugs of abuse from urine with desorption atmospheric pressure photoionization-mass spectrometry (DAPPI-MS) and desorption electrospray ionization-mass spectrometry (DESI-MS).

scientific article

Measuring insulin in human vitreous humour using LC-MS/MS

scientific article published on 18 November 2011

Meconium drug testing reveals maternal misuse of medicinal opioids among addicted mothers.

scientific article published on 6 February 2013

Migration behaviour and separation of tramadol metabolites and diastereomeric separation of tramadol glucuronides by capillary electrophoresis

scientific article

Mitochondrial respiratory dysfunction due to the conversion of substituted cathinones to methylbenzamides in SH-SY5Y cells

scientific article published on 14 October 2015

New psychoactive substances as part of polydrug abuse within opioid maintenance treatment revealed by comprehensive high-resolution mass spectrometric urine drug screening

scientific article published on 13 January 2016

Newer antidepressants: evaluation of fatal toxicity index and interaction with alcohol based on Finnish postmortem data

scientific article

Nicotine, alcohol, and drug findings in young adults in a population-based postmortem database.

scientific article published on 21 April 2011

Non-medical use of psychoactive prescription drugs is associated with fatal poisoning

scientific article

Parenteral buprenorphine-naloxone abuse is a major cause of fatal buprenorphine-related poisoning

scientific article published on 19 July 2013

Patterns of drug abuse among drug users with regular and irregular attendance for treatment as detected by comprehensive UHPLC-HR-TOF-MS.

scientific article published on 28 May 2015

Performance of immunoassays in screening for opiates, cannabinoids and amphetamines in post-mortem blood

scientific article published in January 2003

Pharmacokinetics of oxycodone after intravenous, buccal, intramuscular and gastric administration in children

scientific article

Phenazepam abuse in Finland: findings from apprehended drivers, post-mortem cases and police confiscations

scientific article

Photodiode array to charged aerosol detector response ratio enables comprehensive quantitative monitoring of basic drugs in blood by ultra-high performance liquid chromatography

scientific article published on 17 October 2014

Polydrug abuse among opioid maintenance treatment patients is related to inadequate dose of maintenance treatment medicine.

scientific article published on 6 July 2017

Post-mortem SNP analysis of CYP2D6 gene reveals correlation between genotype and opioid drug (tramadol) metabolite ratios in blood

scientific article

Post-mortem analysis of lactate concentration in diabetics and metformin poisonings

scientific article published on 01 September 2015

Post-mortem vitreous humour as potential specimen for detection of insulin analogues by LC-MS/MS.

scientific article published on 14 October 2013

Precise gas chromatography with retention time locking in comprehensive toxicological screening for drugs in blood ⬇️

scientific article published on May 25, 2003

Prediction of liquid chromatographic retention for differentiation of structural isomers.

scientific article published on 24 January 2012

Pregabalin serum levels in apprehended drivers

scientific article published on 06 July 2014

Prescription opioid abuse based on representative postmortem toxicology

scientific article published on 24 October 2014

Prevalence and blood concentrations of desoxypipradrol (2-DPMP) in drivers suspected of driving under the influence of drugs and in post-mortem cases

scientific article published on 18 January 2013

Prevalence of adverse drug combinations in a large post-mortem toxicology database

scientific article published on 27 June 2008

Profiles of pregabalin and gabapentin abuse by postmortem toxicology

scientific article

Qualitative screening for basic drugs in autopsy liver samples by dual-plate overpressured layer chromatography

scientific article

Quantitative estimation of α-PVP metabolites in urine by GC-APCI-QTOFMS with nitrogen chemiluminescence detection based on parent drug calibration.

scientific article published on 27 February 2018

Screening for basic drugs in 2-mL urine samples by dual-plate overpressured layer chromatography and comparison with gas chromatography-mass spectrometry

scientific article

Screening for basic drugs in hair of drug addicts by liquid chromatography/time-of-flight mass spectrometry

scientific article

Sedative-hypnotics are widely abused by drivers apprehended for driving under the influence of drugs

scientific article published in June 2015

Significant decrease in the rate of fatal alcohol poisonings in Finland validated by blood alcohol concentration statistics

scientific article published on 07 November 2019

Simultaneous identification and quantification of new psychoactive substances in blood by GC-APCI-QTOFMS coupled to nitrogen chemiluminescence detection without authentic reference standards

scientific article published on 11 March 2016

Simultaneous screening and quantification of 25 opioid drugs in post-mortem blood and urine by liquid chromatography-tandem mass spectrometry

scientific article

Simultaneous screening for 238 drugs in blood by liquid chromatography-ion spray tandem mass spectrometry with multiple-reaction monitoring

scientific article published in September 2003

Single-calibrant quantification of drugs in plasma and whole blood by liquid chromatography–chemiluminescence nitrogen detection

scientific article published on 22 June 2007

Single-calibrant quantification of seized synthetic opioids by liquid chromatography-chemiluminescence nitrogen detection

scientific article published on 22 October 2019

Specific screening method for dextran and hydroxyethyl starch in human urine by size exclusion chromatography-in-source collision-induced dissociation-time-of-flight mass spectrometry

scientific article

Straightforward single-calibrant quantification of seized designer drugs by liquid chromatography–chemiluminescence nitrogen detection

scientific article published on 18 February 2014

Summary statistics for drug concentrations in post-mortem femoral blood representing all causes of death

scientific article published on 18 June 2019

The effect of banning MDPV on the incidence of MDPV-positive findings among users of illegal drugs and on court decisions in traffic cases in Finland

scientific article published on 2 April 2015

The relationship between bupropion and suicide in post-mortem investigations

scientific article published on 23 June 2016

Toxic lifespan of the synthetic opioid U-47,700 in Finland verified by re-analysis of UPLC-TOF-MS data

scientific article published on 01 May 2019

Toxicological screening with formula-based metabolite identification by liquid chromatography/time-of-flight mass spectrometry

scientific article

Urine analysis of 3,4-methylenedioxypyrovalerone in opioid-dependent patients by gas chromatography-mass spectrometry

scientific article published in April 2011

Urine naloxone concentration at different phases of buprenorphine maintenance treatment

scientific article published on 19 March 2013

Utility of urinary ethyl glucuronide analysis in post-mortem toxicology when investigating alcohol-related deaths

scientific article published on 02 June 2014

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