Practice oriented Tutorials
The practice-oriented tutorials at analytica Vietnam impart highly topical know-how for laboratory users. Please apply for your participation.
- Tutorial I: Fundamentals of Quality Assurance in the Analytical LaboratoryProf. Tadeusz Gorrecki, University of Waterloo, Canada
April 3, 2019 (10am - 12 noon)
About the tutorial
According to the ISO definition, quality assurance involves "all the planned and systematic activities implemented within the quality system and demonstrated as needed, to provide adequate confidence that an entity will fulfil requirements for quality." In plain English, quality assurance is what the analysts do to make sure that the answers they produce are correct. No analytical measurement is perfectly accurate, and it is the role of the analyst to minimize the uncertainty. Before performing any measurements, the objectives and the specifications should be defined. Quality assurance itself begins with proper sampling. Sample chain of custody should be properly documented. Any method used for the analysis should be properly validated by determining a number of characteristics including specificity, linearity, accuracy, precision, range, limits of detection/quantitation, as well as reporting limits. Robustness of the method should also be evaluated. Once a validated method has been implemented, its performance should be monitored continuously. Analysis of blanks makes it possible to account for interferences by other species and for traces of the analyte that may be present in the reagents used for sampling, sample preparation and analysis. Various types of blanks should be analyzed, including reagent blanks, method blanks, trip blanks, field blanks, etc. Potential matrix effects should be evaluated by analyzing matrix spikes. During the final determination step, stability of the instrument calibration should be closely monitored by including calibration checks at regular intervals. The correctness of the calibration itself is monitored by periodically analyzing performance test samples. All steps involved in quality assurance should be described in detail in standard operating procedures that all personnel involved in the analysis must adhere to.About Prof. Tadeusz Gorrecki
Tadeusz Górecki is a professor at the Department of Chemistry, University of Waterloo (ON). He obtained his M.Sc. Engineer (1981) and Ph.D. (1986) degrees from the Gdansk University of Technology, Poland, and the Professor of Chemical Sciences degree (2009) from the President of the Republic of Poland. Prof. Gorecki's main research area is separation science, with a particular focus on comprehensive two‐dimensional gas and liquid chromatography (GC×GC and LCxLC), passive sampling, and environmental analysis. He is the author/co‐author of 27 book chapters, nearly 170 papers published in peer reviewed journals, over 300 conference contributions (including more than 60 invited presentations) and 6 patents. He is the recipient of the Waksmundzki Medal awarded by the Committee on Analytical Chemistry of the Polish Academy of Sciences for the contributions to separation science, and the winner of the 2017 GCxGC Lifetime Achievement Award at the 41st International Symposium on Capillary Chromatography & the 14th GCxGC Symposium. His papers have been cited over 6500 times.
- Tutorial II: Automated Sample Preparation for LC/MS and GC/MS in food, forensic and materials research analysisMs. Shalene Goh, PhD, Gerstel LLP, Singapore
April 4, 2019 (9am - 12 noon)About the tutorial
Development of Mass Spectrometers coupled to chromatographic separation techniques is continuously ongoing and overall performance is improved steadily. Decreasing the possible Limit of Detection (LoD), and Limit of Quantitation (LoQ) and hence reaching best sensitivity in various sample matrices is greatly dependent on the back end detector in use. However, even the most sensitive MS can only detect what analyte amount reached the analytical column, and therefore a key emphasis should also be given to the front end; the sample preparation and the sample introduction part. Increasing throughput, extending the range of automation, miniaturizing sample volume and solvent usage are key factors in completing sensitive and robust sample analysis from the initial sample all the way to detectable and quantifiable peaks of interest.
A major field where entire sample handling is crucial is Food Safety, where emerging contaminants such as various pesticides or 3-MCPD and Glycidol in Edible Oils and Fats are currently under scope of research and in need of efficient regulations and adequate analysis techniques. The work presented in the seminar shows complete automation of extracting 3-MCPD and Glycidol from different fat matrices and demonstrates how manual sample preparation in well-known QuEChERS procedure can be complemented by automation.
Another field where many manual sample handling steps are very common is forensic applications from diverse matrices. The available amount of initial biological sample such as urine, saliva, blood or serum can be very limited. Paired with time pressure to achieve high quality results it is of most importance to focus on efficient sample preparation techniques. In order to achieve fast and reliable data automated Hydrolysis, Extraction and Determination of Opioids in Urine using a Robotic Autosampler and LC-MS/MS Platform is presented as example for general routine analysis in the modern toxicology laboratory.
In addition to chosen liquid extraction techniques, a direct sample introduction technique based on Thermal desorption for Gas Chromatography with which excellent results can be achieved for investigating Volatile Organic Compounds (VOCs) from different materials such as food or pharmaceutical packages, materials used in car interiors or children toys is also presented.
Daily laboratory challenges from various fields and sample matrices can be faced using modern sample preparation and detection instruments, such as Mass Spectrometers. Choosing the right complete analysis procedure should always comprehend aspects such as human health, environmental aspects and increased sample throughput without sacrificing quality of obtained data.
About the speakers
Shalene Goh is currently working at Gerstel LLP Singapore as a regional application chemist, delivering application and technical expertise support for sample preparation. She previously obtained her PhD in Chemistry from National University of Singapore (NUS) and has developed numerous sample preparation methods with the use of chromatography/mass spectrometry systems, particularly on the automation of miniaturised extraction system with the use of commercially available autosampler. Since then, she has collaborated and worked in partnership with various major key players in the industries to develop automated analytical solutions to monitor contaminants or analytes of interest in a range of applications.
Christina Liew is a regional application chemist at Gerstel LLP Singapore where she provides application and technical support for automated sample preparation using Gerstel MultiPurpose Sampler in various industries. Previously, she received her Ph.D. in Analytical Chemistry from National University of Singapore (NUS) which focuses on the miniaturization and automation of sample preparation techniques hyphenated to gas/liquid chromatography-mass spectrometric system in the analysis of environmental contaminants.
Tan is a Regional Sales Manager for GERSTEL in South East Asia, South Korea and Oceania countries, based in Gerstel LLP Singapore. She has many years of experience in sales & marketing for analytical instrument market. Her responsibilities will be including supporting our distributors and developing new business opportunities.
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