Quality Control Analysis on Commercial Products (Lab Report Sample)

Student’s Name
Professor’s Name
Course
Date
Experiment: Quality Control Analysis on Commercial Products
Introduction
The information provided on the nutrition labels of products consumed on a daily basis is what customers use to know whether or not to purchase a given product. These labels provide necessary information, which not only ensures customers know what they are consuming but also offers fair competition amongst vendors. Accordingly, it is expected that this information should be accurate. However, this has not been the case, and the accuracy of these labels has been questioned in the past. One such occurrence is one instance where Mitch Lipka warned in an article in 2009 about falsified information on these tags. He described how a sugar-free product, according to the label in question, was found to have sugar and another product found to have more sodium than it should have had. Reasonable explanations have been put forward such as production processes NIL the concentrations of some content. There is, therefore, a need for a means of control in order to provide satisfactory products to consumers. Regulations and procedures for quality control have to be introduced. It is important to note that this applies to all goods not only food products. In this experiment, quality control analysis was done on two products: Ascorbic acid tablets (Vitamin C) and orange juice by determining the acid content in each and then comparing the results to what was provided by the manufacturer.
Methods
Materials
The materials used in this laboratory glassware, pH strips, phenolphthalein, bromothymol blue, NaOH, HCl, potassium hydrogen phthalate (KHP), ascorbic acid (Vitamin C) tablets, orange juice, and baking soda powder.
Week One
Preparation of NaOH
To prepare NaOH, 1g of carbonate solution of a stock solution of NaOH (0.1002M) was added to 250ml of CO2 free water and vigorously shaken for over a minute.
Standardization of NaOH
About 2.043g of KHP (0.1003M) was put into 100ml distilled water. 2 drops of phenolphthalein were added. This was titrated with the prepared NaOH solution until the solution started turning pink. Two more repetitions of the procedure were carried out, and the molarity of NaOH was determined for the three trials.
Preparation of HCL
The amount of HCL required to prepare 0.1M HCl was calculated and obtained using a pipette. This solution was put into a volumetric flask and diluted as needed, then put into a clean reagent bottle.
Standardization of HCl
Using a pipette, standard sodium carbonate (25ml) was put into a 250ml conical flask, and 2 drops of phenolphthalein added. This was titrated with the prepared HCl until the solution started turning pink. Two more repetitions of the procedure were carried out, and the molarity of HCl was determined for the three trials.
Week Two
Baking soda
Firstly, 0.87g was dissolved in 100ml of distilled water0. Then, 5-7 drops of methyl orange were added to 3 samples of 20 ml of the solution in flasks. The solution was then titrated using an HCl solution.
Ascorbic acid (Vitamin C)
Half a tablet of ascorbic acid crushed into powder was weighed and recorded. It was then added to 100ml of distilled water and stirred using a magnetic stirrer to dissolve. It was filtered, and 5-7 drops of methyl orange added to three samples 20ml of the solution.
Orange juice
10ml of orange juice was dissolved in 90ml of water and titrated with NaOH. After that, 5-7 drops of methyl orange were added to 20ml samples of the solution.
Results Table 1
Results for the standardization of NaOH

Trial 1

Trial 2

Trial 3

Volume of KHP(ml)

20

20

20

Final buret reading (ml)

21

21.1

20.9

Initial buret reading (ml)

0

0

0

NaOH used (ml)

21

21.1

20.9

Table 2
Results for the standardization of HCl

Trial 1

Trial 2

Trial 3

Volume of KHP(ml)

20

20

20

Final buret reading (ml)

24.3

24.2

24.2

Initial buret reading (ml)

0

0

0

HCl used (ml)

24.3

24.2

24.2

Table 3
Results for Vitamin C

Trial 1

Trial 2

Trial 3

Volume of Vitamin C (ml)

10

10

10

Final buret reading (ml)

1.3

1.2

1.1

Initial buret reading (ml)

0

0

0

NaOH used (ml)

1.3

1.2

1.1

Table 4
Results for Orange juice

Trial 1

Trial 2

Trial 3

Trial 4

Trial 5 (with bromothymol blue

Volume of orange juice (ml)

10

10