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Listening Quiz: Thuyết Trình Tổng Hợp Chất Chuẩn Tham Chiếu Cho Nhóm Phân Tích – Advanced Level
Th6 24, 2025
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What is the main purpose of the conversation?
To schedule a training session for the analytical team
To compare different laboratory manuals
To report a problem with contaminated raw materials
To discuss how a reference standard was synthesized and will be used for testing
Explanation:
Daniel explains how he completed the reference standard synthesis, verified its purity, and will provide documentation so the team can use it for verification.
2.
What method did Daniel use to check the purity during synthesis?
HPLC
Microscopy
Titration
Mass spectrometry
Explanation:
Daniel says, ‘I used HPLC at different stages to check purity.’
3.
What was the final purity percentage of the reference standard?
97.0%
100%
99.5%
95.5%
Explanation:
Daniel states that ‘The final purity was 99.5%, which meets our standard.’
4.
What can be inferred about the final product?
It still needed more purification before use
It contained several major impurities
It was suitable for use as a reference standard
It failed to meet the required standard
Explanation:
Daniel says the final purity was 99.5%, it met the standard, and no significant impurities were detected, so it was suitable as a reference standard.
5.
What should the analytical team do next?
Wait until Daniel checks the purity one more time
Compare sample results against the standard after receiving it
Repeat the synthesis using different raw materials
Rewrite the lab manual before testing begins
Explanation:
Sarah asks how the standard will be used, and Daniel replies that the team will compare sample results against it and can start as soon as they receive it.
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