HSO技術知識庫>什麼是標準液(標準品)?
Document ID : TE767
Published Date : 08/17/2020
Published Date : 08/17/2020
Source: Hach-US HSO
Question : What is a standard solution?
Summary : Definition of a standard solution
A standard solution is a solution that contains a specified concentration of a parameter, such as chlorine or iron. When a standard solution is used in place of a sample and tested, the result should match the concentration of the standard. A matching result will give confidence that the test is working correctly. Any significant discrepancies (greater than 10%) indicate a problem that must be investigated.
Hach carries many Standard Solutions at concentrations that fall within most test ranges. Some standard solutions are so unstable that they are difficult to make and use and are therefore not available. Such standards include hydrogen sulfide, chlorine dioxide, dissolved oxygen, and ozone. Chlorine standards are available only at high concentrations, and must be diluted with high-quality dilution water using glassware that has no chlorine-demand.
Standard solutions can also be used to calibrate instruments such as colorimeters and spectrophotometers, as well as electrochemical meters such as pH and pH/ISE meters. Varying concentrations of a standard solution can be used to make a calibration curve that in turn can be used to find the concentration of samples.
標準液是水質參數(例如氯或鐵)的特定濃度的溶液。當使用標準液代替水樣而進行測試時，結果應與標準液的濃度一致。匹配的結果讓您確認測試工作正常。任何重大差異(大於10％)都表示需要進一步查出問題。
Hach提供多種測試範圍濃度的標準液。有些標準液很不穩定以至於難以製造和使用，因而無法製作，包括硫化氫，二氧化氯，溶氧和臭氧。氯標準液只能以高濃度使用，且必須使用高品質的稀釋水裝在無氯要求的玻璃器皿中稀釋。
標準液也可用於校正儀器，例如校正比色計和分光光度計，以及pH和pH / ISE計等電化學計。可以使用不同濃度的標準液來製作校正曲線，然後使用該校正曲線來查出水樣的濃度。
Hach提供多種測試範圍濃度的標準液。有些標準液很不穩定以至於難以製造和使用，因而無法製作，包括硫化氫，二氧化氯，溶氧和臭氧。氯標準液只能以高濃度使用，且必須使用高品質的稀釋水裝在無氯要求的玻璃器皿中稀釋。
標準液也可用於校正儀器，例如校正比色計和分光光度計，以及pH和pH / ISE計等電化學計。可以使用不同濃度的標準液來製作校正曲線，然後使用該校正曲線來查出水樣的濃度。