SCYM Quality Control & Assurance

Question 1

Why is quality control important in flow cytometry?

Accepted Answer

Ensures accurate results

Answer

Quality control (QC) is paramount in flow cytometry to ensure the reliability, reproducibility, and accuracy of experimental results. Regular QC checks, including instrument calibration and daily performance monitoring, help identify and correct potential issues with the instrument or reagents. This rigorous approach minimizes variability and ensures that the data collected is trustworthy and scientifically sound, leading to confident conclusions.

Question 2

What is a control sample used for?

Accepted Answer

Change dye colors

Answer

Control samples are indispensable in flow cytometry experiments because they serve as a reference point for interpreting experimental data. They help to identify background fluorescence, assess non-specific binding, determine positive and negative populations, and ensure proper compensation. By comparing experimental samples to appropriate controls, researchers can confidently draw conclusions about their specific markers and cell populations, ensuring data validity.

Question 3

How often should cytometers be calibrated?

Accepted Answer

Daily or before use

Answer

Flow cytometers should be calibrated and their performance verified daily or before each use. This routine quality control involves running standardized fluorescent beads to check instrument settings, laser alignment, fluidics, and detector sensitivity. Daily calibration ensures consistent and reproducible data acquisition over time, which is crucial for reliable experimental results and accurate comparisons between different runs and experiments.

Question 4

Which beads are used to verify instrument performance?

Accepted Answer

Fluorescent calibration beads

Answer

Fluorescent calibration beads, also known as reference or QC beads, are specifically used to verify and standardize the performance of flow cytometers. These beads have known and consistent fluorescence intensities and sizes, allowing researchers to check instrument sensitivity, linearity, and alignment. Running these beads daily helps ensure that the instrument is operating optimally and that data collected is comparable across different experiments and days.

Question 5

Why must reagents be stored correctly?

Accepted Answer

Ensure performance and shelf life

Answer

Reagents are chemical substances essential for accurate experimental results in fields like cytometry. Incorrect storage conditions, such as exposure to inappropriate temperatures or light, can degrade their chemical integrity and stability. Proper storage ensures that reagents maintain their intended performance characteristics and remain effective for their specified shelf life, which is crucial for reliable and reproducible scientific work.

(SCYM) Specialist in Cytometry Practice Test

(SCYM) Specialist in Cytometry Practice Test

SCYM Quality Control & Assurance