How do you perform a 10 fold serial dilution?

Making a 10 Fold Dilution

The first step in making a serial dilution is to take a known volume (usually 1ml) of stock and place it into a known volume of distilled water (usually 9ml). This produces 10ml of the dilute solution. This dilute solution has 1ml of extract /10ml, producing a 10-fold dilution.

Then, what does it mean by 10 fold dilution?

A ten-fold dilution reduces the concentration of a solution or a suspension of virus by a factor of ten that is to one-tenth the original concentration. A series of ten-fold dilutions is described as ten-fold serial dilutions.

Furthermore, what is a 5 fold serial dilution? “The dilution factor is 5" “It was a 5 fold dilution” “It was diluted 1/5" These all mean the same thing, that there is 1 volume part of sample and 4 volume parts of whatever liquid is being used to dilute the sample for a total of 5 volume parts. CALCULATING THE CONCENTRATION.

Additionally, how do you do a two fold serial dilution?

So, make three serial 1/10 dilutions (0.1 ml [100 microliters] into 0.9 ml): 1/10 x 1/10 x 1/10 = 1/1,000. Now you could add 1.0 ml of the starting 1/1,000 dilution to 1.0 ml of diluent, making a 2-fold dilution (giving 1/2,000).

Why is serial dilution performed?

A serial dilution is a series of sequential dilutions used to reduce a dense culture of cells to a more usable concentration. Each dilution will reduce the concentration of bacteria by a specific amount.

28 Related Question Answers Found

How do you do a serial dilution?

The first step in making a serial dilution is to take a known volume (usually 1ml) of stock and place it into a known volume of distilled water (usually 9ml). This produces 10ml of the dilute solution. This dilute solution has 1ml of extract /10ml, producing a 10-fold dilution.

How do you convert dilutions?

Convert the dilution factor to a fraction with the first number as the numerator and the second number as the denominator. For example, a 1:20 dilution converts to a 1/20 dilution factor. Multiply the final desired volume by the dilution factor to determine the needed volume of the stock solution.

Why are dilutions used?

Dilution is the process of making a solution weaker or less concentrated. In microbiology, serial dilutions (log dilutions) are used to decrease a bacterial concentration to a required concentration for a specific test method, or to a concentration which is easier to count when plated to an agar plate.

How do dilutions work?

A dilution is a solution made by adding more solvent to a more concentrated solution (stock solution), which reduces the concentration of the solute. An example of a dilute solution is tap water, which is mostly water (solvent), with a small amount of dissolved minerals and gasses (solutes).

What is 1fold dilution?

A two-fold dilution reduces the concentration of a solution by a factor of two that is reduces the original concentration by one half. A series of two-fold dilutions is described as two-fold serial dilutions. In this manual, two-fold serial dilutions are carried out in small volumes in microwell plates.

How do you calculate ten fold?

Divide the original amount by the new amount to determine the fold change for a decrease. For instance, if you have 20 grams of water at the beginning of an experiment and end up with 4 grams, divide the original number (20) by the new (4) and note the answer as a negative result. In this case, 20/4 = -5 fold.

What does 10 fold mean?

Definition of tenfold. 1 : being 10 times as great or as many. 2 : having 10 units or members.

What is a 20 fold dilution?

A 20-fold dilution just means the final solution is 20 times less concentrated than the original. An easy way to perform this is to take say 5 mL of your original acid using a pipette, transfer it to a 100 mL volumetric flask and then fill to the mark with distilled or RO water.

What does serial dilution mean?

A serial dilution is the stepwise dilution of a substance in solution. Usually the dilution factor at each step is constant, resulting in a geometric progression of the concentration in a logarithmic fashion.

Why is serial dilution more accurate?

It is much more accurate to make several smaller stepwise dilutions to reach a final concentration when the required reduction in concentration is large. Clearly, accurate pipetting during preparation of serial dilutions is critical, because any deviation will propagate to all of the subsequent steps.

What is serial dilution and why is it used?

Serial dilution is the stepwise dilution of a substance in solution. Serial dilutions are used to accurately create highly diluted solutions as well as solutions for experiments resulting in concentration curves with a logarithmic scale.

What is a 3 fold dilution?

Since the dilution-fold is the same in each step, the dilutions are a geometric series (constant ratio between any adjacent dilutions). For example: 1/3, 1/9, 1/27, 1/81 Notice that each dilution is three-fold relative to the previous one.

Do you multiply or divide by dilution factor?

The number of dilutions is equal to the number of times the dilution factor will be multiplied by itself to equal the starting concentration divided by the final concentration. So with a dilution factor of 10, 10 to the X power is equal to the starting concentration divided by the final concentration.

How do you determine concentration?

The standard formula is C = m/V, where C is the concentration, m is the mass of the solute dissolved, and V is the total volume of the solution. If you have a small concentration, find the answer in parts per million (ppm) to make it easier to follow.

How is dilution factor calculated?

To calculate the dilution factor, you need two things: the original volume of the solution you dilute and the final volume after diluting (or the volume you have added to dilute, in which case the final volume will be the original volume plus the volume you have added).

How do you multiply dilution factor?

This method is called multiplying by the inverse (of the dilution factor).

If the dilution factor is in the form of a fraction, "flip" the fraction. (i.e., 1/50 becomes multiply by 50/1).
If the dilution factor is in decimal form, multiply by 1 over the decimal. (i.e., 0.02 becomes multiply by 1/0.02).

How do you make a 1/4 dilution?

For example, to make a simple dilution using a 1:4 dilution ratio with a 10 mL sample in a laboratory, you know that one part equals your 10 mL sample. If you multiply that one part (10 mL) by four parts, you know that you should add 40 mL of water to your sample, resulting in a 1:4 ratio (10 mL: 40 mL).