比色計與分光光度計有何不同?
1.比色計（也稱為過濾光度計）和分光光度計都測量水樣吸光度以確定分析物濃度。
2.比色計通常是攜帶式的，使用LED光源和彩色濾光片。 因此，它們在固定波長下工作，並且只能適應包含這些(固定)波長的測試。
3.分光光度計通常是實驗室桌上型儀器，使用可產生各種波長的光源。 Hach使用的分光光度計使用鎢（或氙）燈產生可見光譜中的光，使用氘燈產生紫外光。 分光光度計還使用單色儀來選擇所需的波長。 因此，分光光度計可用於廣泛的測試。
4.比色計和分光光度計之間的差異：
|
|
比色計（濾片式光度計） |
分光光度計 |
|
光源 |
LED，固定波長 |
燈（鎢，氙，氘），波長范圍 |
|
波長選擇器 |
彩色濾光片，固定波長 |
單色儀，波長范圍 |
|
可移植性 |
固定部件，重量輕，適合野外使用 |
活動部件較重，適合在工作台上使用。 |
|
參量 |
由固定波長確定的單個或有限數量的參數 |
由波長范圍確定的眾多參數。 |
What is the difference between a colorimeter and a spectrophotometer?
Summary
Difference between a colorimeter and spectrophotometer.
Answer
Colorimeters (also referred to as Filter Photometers) and Spectrophotometers both measure sample absorbance to determine analyte concentrations.
Colorimeters are usually portable and use LED light sources and color filters. As a result, they operate at fixed wavelengths and can only accommodate tests that incorporate those wavelengths.
Spectrophotometers are usually bench top instruments and use light sources that can produce a range of wavelengths. The spectrophotometers used by Hach use tungsten (or Xenon) lamps to produce light in the visible spectrum and deuterium lamps to produce UV light. Spectrophotometers also use monochromators to select for a desired wavelength. As a result, spectrophotometers can be used for a broad range of tests.
The following table highlights the differences between Colorimeters and Spectrophotometers:
|
|
Colorimeter (Filter Photometer) |
Spectrophotometer |
|
Light Source |
LED, Fixed Wavelength |
Lamp (Tungsten, Xenon, Deuterium), Wavelength Range |
|
Wavelength Selector |
Color Filter, Fixed Wavelength |
Monochromator, Wavelength Range |
|
Portability |
Stationary parts, light weight, good for field use |
Moving parts, heavier, good for bench use. |
|
Parameters |
Single or Limited Number of Parameters determined by Fixed Wavelengths |
Numerous Parameters determined by the Wavelength Range. |
