What are the 4 types of assays

Know the types of diplomas in chemistry which can be classified according to the type of substance, according to the method used for the titration, according to the procedures and the objectives, and according to the nature of the solvents and the chemical reaction, etc.

A titration is a method by which a solution of known concentration is used to determine the concentration of an unknown solute. The titrant is usually applied from a burette to a known amount of compound unless the reaction is complete. To indicate integrity (end point or equivalence point), a visual indicator (buffer solution or pH) is often used.

The titration formula can easily determine the concentration of the analyte because the volume of the titrant is already known. A conical flask, beaker, funnel, burette and stand, volumetric flask, pipette, wash bottle, and necessary chemicals are used to perform a routine titration to determine the concentration of a solute.


  1. Type of assessment
  2. Ranking by valuation method
  3. Classification based on the nature of the solvents and the chemical reaction
  4. Classification according to the quality of reagents

It is one of the most common burette techniques of quantitative analysis in the health and life sciences and is titrated by many industries around the world. It is routine laboratory work that typically has applications in many industries, such as pharmaceuticals, agriculture, chemicals, water treatment, wine, cosmetics, food, dairy products, automotive and environmental studies, etc. school and college courses.

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How to classify comments:

Titrations are divided into different types depending on the type of compost to be evaluated or the type of analysis to be performed.

Classification of the evaluation according to the evaluation method:

Includes direct assessment and indirect assessment. Direct titration is a basic titration technique that involves the reaction between unknown compounds and compounds of known concentration.

Indirect titration is also known as post-titration and is performed when normal titrations are slow and their endpoint is difficult to determine. This is called the reverse process of running titrations. It usually involves two steps; the analyte reacts with the first reagent added in excess. The reaction of the added reagent with the second reagent determines its volume.

Classification of titration according to the nature of the solvents and the nature of the chemical reaction:

Includes acid-base titrations, redox titrations, precipitation titrations and complexometric titrations, etc. Among these, the most widely used types of titration in quantitative chemical analysis are redox titrations and acid-base titrations.

Titration classification based on the quality of the reagents used:

It includes titrations of strong acid with strong bases, strong acids with weak bases titrations, strong base with weak acids and weak bases with weak acids, etc. These types are typically used in acid-base titrations.

Different types of valuation:

Depending on the nature of the chemical reaction that takes place between the titrant and the sample, there are four types of titrations, such as acid-base titrations, redox titrations, precipitation titrations, and complexometric titrations, etc.

Acid-base titrations:

Acid-base titration is used to find the concentration of unknown acid or base, which is neutralized by a known concentration of acid or base. The concentration can be measured by the stoichiometry of the reaction.

Use the neutralization reaction that takes place between acid and base and how it will react when the formulas for acid and base are known. Strong acid base, strong acid base, strong acid base and weak acid base and weak acid base are the four forms of acid-base titration.

Redox titrations:

Redox titration is a technique to measure the concentration of a certain compound due to a redox reaction between the titrant and the compound. Sometimes these forms of titration include the use of a redox indicator or a potentiometer. It works from the oxidation-reduction reaction between the compound and the titrant.

Determining the concentration of unknown compounds is one of the most common laboratory methods. The main types of redox titrations are iodometry or iodimetry, bromatometry, cerimetry, permanganometry and dichrometry, etc.

Precipitation titrations:

Precipitation titration is a titrimetric method that involves the formation of precipitates during the titration process. In which the titrant reacts with the compost and forms an insoluble material and this titration continues until the last drop of compost is consumed. If the titrant is in excess, it will react with the indicator and signal the end of the titration process.

According to the endpoint detection method, precipitation titration has three main types which are widely used depending on the type of applications such as Mohr's method, Volhard's method and Fagan's method.

Complexometric titrations:

In this type of titration, the metal ion reacts with the indicator to form a metal indicator complex. Then ethylenediaminetetraacetic acid is added which reacts with a metal ion to form a metal-EDTA complex which is more stable than the metal-indicator complex. Therefore, the metal-indicator complex then decomposes and gives free metal ions to react with EDTA.

Free metal ions are not present at the equivalence point and therefore the free indicator ion gives a different color than the complex color of the indicator of the metal. Post titration, substitution titration, direct titration and indirect titration are the types of complexometric titration.

The most frequent quotes on evaluation are as follows.

What is the main purpose of the evaluation?

The basic purpose of titration is to determine the unknown concentration in a sample by an analytical method.

What are the different indicators used in the evaluation method?

Phenolphthalein, Methyl Violet, Methyl Red, Methyl Yellow, Methyl Orange, Eriochrome Black T, Litmus, Bromothymol Blue, Crystal Violet, Sodium Diphenylamine, P -nitrophenol, starch indicator and thymol blue are the different types of indicators used in titration methods depending on the reaction.

What are the different instruments used in the evaluation method?

Different types of instruments can be used such as automatic titrator, pH meter, conductivity meter (conductometry), potentiometer, Karl-Fischer titrator, colorimeter, thermometric titrator and amperometry, etc. to make an accurate assessment.

What is the double degree with example?

Double titration means that two titrations are performed at one time, where the first titration is used to standardize the titrant, while the second titration is used to determine the molarity of the titrant. For example, calculating the molarity of hydrochloric acid (acid) by titration with sodium hydroxide (base).

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