colorimeter

/,kʌlə'rimitə/

Thân thiện

A scientist uses a colorimeter to analyze a liquid sample.

Definition

1. Noun:
   • A scientific instrument for measuring color: A colorimeter is a device used to measure the concentration of a substance in a solution by analyzing the color intensity of that solution. It operates on the principle that the color's depth is proportional to the concentration of the colored compound present.

Usage

• The primary use of a colorimeter is in quantitative chemical analysis, known as colorimetric analysis. It is commonly employed in laboratories for tasks such as determining chemical concentrations in water, food, or biological samples.
• To use a colorimeter, a sample is treated with a specific reagent to produce a color. The device then shines a light through the colored solution and measures the amount of light absorbed, which correlates to the concentration.

Examples

• Noun:
  • The technician used a colorimeter to measure the chlorine levels in the swimming pool water.
  • Accurate results from the colorimeter confirmed the presence of the target protein in the sample.

Advanced Usage

• "Digital colorimeter": A modern colorimeter that provides a direct digital readout of concentration values, often connected to computer software for data analysis.
  • The lab upgraded to a digital colorimeter for faster and more precise measurements.

Variants and Related Words

• Colorimetric (adj): Pertaining to or involving the use of a colorimeter or colorimetric analysis.
  • The colorimetric assay is a standard method in this field.
• Colorimetry (n): The science or technique of using a colorimeter to perform quantitative chemical analysis based on color.
  • He specialized in colorimetry for environmental testing.

Synonyms

• Photometer: A broader category of instruments for measuring light intensity, which includes colorimeters. While all colorimeters are photometers, not all photometers are designed for the specific color comparison of colorimetric analysis.
• Spectrophotometer: A more complex instrument that measures light intensity across a spectrum of wavelengths, often used for similar but more detailed analyses than a basic colorimeter.

Related Phrases and Idioms

(Note: As a highly specific scientific instrument, 'colorimeter' is not typically used in idiomatic expressions or common phrasal verbs.)

Học thuật

Noun

1. a measuring instrument used in colorimetric analysis to determine the quantity of a substance from the color it yields with specific reagents

Từ đồng nghĩa

• tintometer