Why do we aliquot samples?
When a drug or alcohol test is performed, a specimen such as blood, saliva, or urine is taken from the test subject. An aliquot, or measured portion of that specimen, is then used to perform the actual testing. The aliquot portion serves as a representative sample of the specimen as a whole.
What are aliquot parts math?
An aliquot part of a number, n, is a divisor of n that is positive and is not n itself. Aliquot parts of a number are also called positive proper divisors of a number.
What is the aliquot part of one fourth?
Aliquot or Aliquot part means an officially designated subdivision of a lease’s area, which can be a half of a lease ( 1/2), a quarter of a lease ( 1/4), a quarter of a quarter of a lease ( 1/41/4), or a quarter of a quarter of a quarter of a lease ( 1/.
What is aliquot method?
In pharmacy, the aliquot method refers to measuring out a small amount of a chemical or drug by diluting a larger amount, making the needed quantity measurable.
How will you know when a specimen requires Aliquoting?
Specimen may need to be aliquoted for the following reasons: a. Plasma is the required specimen b. There is no gel separator to separate the serum/plasma from the cells c. Stability requires this done before transporting to the laboratory.
Why do we need to aliquot samples prior to testing?
What is the aliquot method?
What are aliquot numbers?
In mathematics, an aliquot sequence is a sequence of positive integers in which each term is the sum of the proper divisors of the previous term. If the sequence reaches the number 1, it ends, since the sum of the proper divisors of 1 is 0.
Why is it important to prepare aliquots of the working solution?
This precaution avoids possible contamination from the pipette or transfer device. Always pour an aliquot from the standard solution to a suitable container for the purpose of volumetric pipette solution transfer and do not add the aliquot removed back to the original standard solution container.
Why do you think is it important to aliquot reagents in the Clinical Chemistry Section?
Essentially, you can take your primary samples and aliquot them into equal parts. This allows you to use individual portions when needed. Aliquoting also limits the potential for your sample to decompose due to temperature sensitivity problems.
Why aliquot is important in volumetric analysis?
Besides functioning as a technique used to separate a larger sample into smaller parts, aliquoting plays a very important role in the temperature sensitivity of substances. For example, in chemistry, some substances can rapidly decompose (or deteriorate) when exposed repeatedly to variable temperature environments.
What is aliquot method of weighing?
The aliquot method of weighing is a method by which small quantities of a substance may be obtained within the desired degree of accuracy by weighing a larger-than-needed portion of the substance, diluting it with an inert material, and then weighing a portion (aliquot) of the mixture calculated to contain the desired …
Is aliquot a fraction?
A fraction of the type 1/n, where n is a natural number. It is essential, in solving several physical and mathematical problems, that each positive rational number is representable as a sum of a finite number of aliquot ratios, with different denominators.
How do you determine aliquot?
You calculate aliquots when the dose you need is smaller than the minimum weighable quantity (MWQ) of the scale you are using, which is based the scale’s sensitivity. By industry standards, pharmaceutical balances must have a minimum accuracy of 95 percent, a fact used in calculating aliquot.
What should be consider to achieve the accuracy of the concentration in preparing solutions?
How to Make Accurate Stock Solutions
- Make up solutions and standards using volumetric flasks.
- Use the correct balance, correctly.
- Make reagents in large batches where possible.
- Take into account the strength of reagents you are using.
What is the aim of preparing a standard solution?
Standard solutions are solutions with a known concentration of a substance. They’re used in chemistry, particularly analytical chemistry, to help identify or determine the concentration of unknown substances. Primary standards are often used when preparing standard solutions.
What is aliquot in lab testing?
1. Aliquot means to separate a portion of the serum or plasma and place in a separate tube. 2. Serum and Plasma is the clear upper fluid or fluid above the gel from a centrifuged tube. 3.
How do you calculate moles in aliquot?
The moles of solute in the aliquot (volume taken from the original solution) equals the moles of solute in the diluted solution. The important thing to remember about the dilution equation is that the moles of solute in the aliquot [Mc*Vc] equals the moles of solute in the diluted solution [Md*Vd].
What do you mean by aliquot?
Definition of aliquot 1 : contained an exact number of times in something else —used of a divisor or part 5 is an aliquot part of 15. an aliquot portion of a solution. 2 : fractional an aliquot part of invested capital.
What is an aliquot sample?
The 5ml samples would be our aliquots as they are the part to the whole, or 25ml total NaCl solution. Given what we have learned about part to whole, why do you suppose those two glasses of lemonade can be classified as aliquot samples?
What is the purpose of using an aliquot?
Aliquoting also limits the potential for your sample to decompose due to temperature sensitivity problems. These problems may stem from issues such as the repeated cycle of thawing and refreezing of your original sample. A second function of aliquots is associated with chemical titrations.
Which of the following describes the technique of aliquoting?
The ability to split a larger sample into smaller parts describes the technique of aliquoting. Aliquot refers to a sub-sample that is taken from a homogeneous liquid solution. Homogeneous materials or solutions are uniform in appearance and composition.
What are aliquots in chemistry?
They are small amounts of a larger solution (either acid or base) that are added incrementally, one amount at a time, to the analyte solution. As each aliquot is added, the pH of this analyte solution is determined. The ability to split a larger sample into smaller parts describes the technique of aliquoting.