absorbance

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数据源: ai_enrichment
吸光率是化学和物理学中用于描述物质吸收光的能力的物理量,通常通过测量光通过样品后的强度变化来计算。

用法要点

句型搭配

absorbance通常作为名词使用,常见于描述测量结果或实验数据,如“The absorbance of the solution was measured at 450 nm.”。

• measure the absorbance
• calculate the absorbance
• report the absorbance

介词用法

absorbance常与介词“at”连用,指定测量时的波长,例如“absorbance at 260 nm”;也可与“of”连用,表示某物质的吸光率,如“absorbance of the sample”。

• absorbance at 340 nm
• absorbance of the compound
• absorbance in the UV range

语域说明

absorbance是专业术语,主要用于科学、工程和医学领域,如化学分析、生物实验和材料测试,在日常对话中较少使用。

• used in spectroscopy
• common in lab reports
• technical term in optics

基础例句

In our chemistry class, we learned how to measure the absorbance of a colored solution using a spectrophotometer.

在化学课上,我们学习了如何使用分光光度计测量有色溶液的吸光率。

The absorbance of this water sample is high, indicating it might contain impurities.

这个水样的吸光率很高,表明它可能含有杂质。

To check the concentration, you need to compare the absorbance readings from different samples.

为了检查浓度,你需要比较不同样品的吸光率读数。

高级例句

The research paper reported an absorbance of 0.8 at 280 nm for the protein solution, confirming its purity.

研究论文报告了蛋白质溶液在280纳米处的吸光率为0.8,证实了其纯度。

In pharmaceutical quality control, absorbance measurements are critical for ensuring drug consistency and safety.

在制药质量控制中,吸光率测量对于确保药物一致性和安全性至关重要。

The engineer analyzed the absorbance spectrum to optimize the material's light absorption for solar cell applications.

工程师分析了吸光光谱,以优化材料在太阳能电池应用中的光吸收性能。

高频搭配

verb

measurecalculatedeterminerecordanalyze

adjective

highlowspecificopticalmeasured

noun

spectrophotometerwavelengthsamplesolutioncoefficient

adverb

accuratelydirectlytypicallyexperimentally

preposition

atofinfor

phrase

absorbance valueabsorbance spectrumabsorbance readingabsorbance unit

常见错误

❌ 错误:The absorbance for the sample is measured.
✓ 正确:The absorbance of the sample is measured.

错误使用了介词“for”,在表示某物质的吸光率时,应用“of”来连接,如“absorbance of the sample”,以准确表达所属关系。

❌ 错误:We need to absorbance the light to see the result.
✓ 正确:We need to measure the absorbance to see the result.

错误地将“absorbance”用作动词,它是一个名词,表示吸光率这一概念,正确用法是作为名词与动词如“measure”搭配,例如“measure the absorbance”。

近义词辨析

absorption

absorption是更广义的术语,指物质吸收光、热或其他能量的过程;而absorbance特指在光谱学中量化光吸收的物理量,通常通过测量计算得出。

Absorption of light by the material is high, but the absorbance value depends on the measurement conditions.

optical density

optical density与absorbance常互换使用,都表示光通过介质后的衰减程度,但optical density更常用于物理学和工程领域,absorbance更侧重于化学和生物应用。

In microbiology, absorbance is used to estimate cell density, while optical density is a broader term in optics.