How to answer this Technical interview question about Accuracy in Analysis for Mid-Level Laboratory Chemist?

How do you ensure accuracy and precision when conducting chemical analyses in the laboratory?

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Laboratory Chemist

Technical

Asked at

BASF

Difficulty :

Medium

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Explanation

This question assesses your understanding of analytical chemistry techniques and your ability to maintain accuracy and precision in experimental results. Recruiters are looking for candidates who can implement quality control measures, use calibrated equipment, and follow standard operating procedures (SOPs). A strong answer will include specific methods and tools used. Avoid failing to address the importance of repeatability and documentation.

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Answer Example

I ensure accuracy by calibrating instruments like spectrophotometers and balances before use and following strict SOPs for sample preparation. For example, during a recent project, I performed titrations using volumetric glassware and cross-verified results by running control samples, achieving 98% reproducibility. I also document every step in a lab notebook to maintain traceability. This structured approach ensures reliable and precise results.

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