How does the transmission of UV light through coloured light filters affect the concentration of linalool during the storage of extracted Basil oil, dissolved in ethanol, as measured by Gas Chromatography Mass Spectrometry?SL
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B
Official IB Result
IB Grade: B
Criteria A: Focus and Method
3/6
0
3
6
Criteria Strands
A.1Topic communication and explanation
Good
A.2Research question formulation and focus
Moderate
A.3Research methodology
Moderate
Criteria Feedback
- Clear and sustained communication of the investigation’s purpose, with accurate description of the topic and relevant chemical context
- Explicitly phrased research question focusing on a single analyte and variable
- Comprehensive step-by-step procedural description supporting replicability
- Some digressions and redundancy dilute focus and precision
- Conceptual misalignment between the chosen visible-light metric and the UV absorption relevant to linalool weakens coherence
- Methodological controls (e.g., dark control, replication, blank runs) are incomplete or under-specified
Criteria B: Knowledge and Understanding
4/6
0
3
6
Criteria Strands
B.1Application of source material
Moderate
B.2Subject knowledge
Good
B.3Use of terminology and concepts
Good
Criteria Feedback
- Accurate and consistent use of subject-specific terminology (e.g., photodegradation, retention time, %RSD)
- Clear and coherent knowledge of photochemical processes and GC-MS operation
- Relevant application of source material to explain photodegradation pathways and justify instrumentation
- Occasional mixing of visible-light and UV terminology reduces precision
- Application of Y-transmission data is mis-aligned with UV attenuation without quantitative support
- Key quantitative benchmarks and detailed instrument parameters (e.g., ionization mode) are under-developed
Criteria C: Critical Thinking
9/12
0
6
12
Criteria Strands
C.1Research quality
Moderate
C.2Analysis depth
Poor
C.3Discussion and evaluation
Poor
Criteria Feedback
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- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
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Criteria D: Presentation
3/4
0
2
4
Criteria Strands
D.1Structure appropriateness
Good
D.2Layout considerations
Good
Criteria Feedback
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- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.