Critical Reflection of a Journal Article (USE THIS AS A GUIDE – REFERENCE THE SAME ARTICLE)
Summarizing research articles will help you to develop your critical thinking skills and your ability to express yourself in the written form. A research article is written to get across a lot of information quickly to a reader. Reading such articles can be tedious and sometimes frustrating unless you are familiar with scientific writing and the reasons for this style. Research articles are highly structured to make information easy to find. Unlike literary writing, scientific writing emphasizes quantifiable information; as a result, the writing is very lean and extra words are avoided.
A research article has the following major sections: Title Page, Abstract, Introductions, Method, Results, Discussion, References, Tables and Figures. An article summary highlights the information in the Introduction, Methods, Results, and Discussion. Before you can write such a summary, you need to read and understand the article.
Reading the Article
Remember that you are digesting information, not swallowing it whole. If an idea is relevant to your topic, you should be able to summarize it in your own words. If you can’t, you probably don’t understand it.
Article Conditions:
Article Critical Reflection Questions
Bibliographic Information:
Article Title: Spectrophotometric Determination of Vitamin C in Pharmaceutical Preparations using Ammonium Metavanadate.
Journal: Asian Journal of Research in Chemistry
Year: 2017 Volume: 10, Issue 3 Page Numbers: 341-344
Other Identifying information if not a journal:
How did you locate this article?
Summary:
The aim of this experiment was to test the Spectrophotometric method for measuring the concentration of vitamin C in pharmaceutical products such as Orange peel, Alma squash and Astymin C in order to compare the values obtained to the values on the manufacturer’s label. A Spectrophotometer is an instrument that passes light through a solution and measures how much light it has absorbed (Absorbance, A), but there has to be a color gradient based on the concentration of vitamin C. To accomplish this, ammonium metavanadate was added to the vitamin C, forming a green color which was bolder with increased vitamin C concentration. Using portions of known vitamin C concentration and getting their absorbances, a Beer’s law plot of Absorbance vs Concentration (μg/cm3). Unknown concentrations can be found using the equation of the trendline, of this graph: Absorbance, y = Slope, m (Concentration, x) + y-intercept, C.
(147 words)
Procedures:
In this experiment, each of the pharmaceutical products such as Orange peel, Alma squash and Astymin C were prepared differently based on their stock solution, to 1000ppm. For the Orange peel power, they weighed out 10 grams of the powder, diluted to 250 mL of distilled water, boiled for 5 hrs., filtered using Whatman 41 paper, and 5mL was used. For the Amla squash, 10 mL of stock was diluted to 100 mL and 10 mL was used. Lastly for the Astymin C drops, 0.1 mL of stock was diluted to 100 mL and 1 mL was used. Their recommended procedure was to use 1 mL of a solution of 1000 ppm vitamin C with 1 mL of a 0.5 % w/v ammonium metavanadate (prepared by dissolving 0.5g of ammonium metavanadate in 100 mL of distilled water) made to a 25 mL solution using distilled water. This solution was in the 5.0-6.0 pH range.
The maximum wavelength was 395 nm and this was gotten using an absorption spectra of the complex against a blank. It was found that the complex and color was unstable past four hours, however, the color showed instantly. A Beer’s law plot of Absorbance vs Concentration (μg/cm3) was done for known concentrations of vitamin C, and then used to find the concentration of the Unknowns using the equation of the trendline, of this graph: Absorbance, y = Slope, m (Concentration, x) + y-intercept, C. There was no table showing the data values for the known compounds. The results of this method was tested using the pH metric method to validate the results, but this was done only with the Orange squash sample.
For the tools, a. Boush and Lomb spectronic-20 was used with 1cm matched glass cell. Potassium chromate in KOH solution and potassium permanganate in sulphuric acid solution was used to calibrate the spectrophotometer, using an absorption spectra. This was not explained in detail. The pH meter was also calibrated, done pH 4.0, 7.0 and 9.2 buffer solutions.
Findings:
For the calibration curve the line was y= 0.009x + 0.014 with an R2 value of 0.9951. Because the R2 value is strong, the correlation is also strong.
For the Orange peel powder, the Spectrophotometric method gave 52.00 ± 4.62 μg/cm3 and the pH metric method 49.00 ± 3.35 μg/cm3 which is very close. There was no data on the manufacturer’s concentration.
For the Amlasquash (Nutri value) the Spectrophotometric method gave 63.33 ±5.76 μg/cm3 with a factory value of 65 μg/cm3, which is also close.
For Astymin C drops the Spectrophotometric value was 66.66 ± 5.77 μg/cm3 and the factory value was 70 μg/cm3 . No data for pH method.
The precision and accuracy of the method was tested by doing 8 replicate sampeles of each solution of 200.0 μg of vitamin C. The average was .94±0.028 at 95% confidence level. The standard deviation was 0.0394 and the variance was 0.0016.
Personal comments:
This was an adaptation of what was learned in class. I believe it was necessary to do both pH metric and spectrophotometric methods to test the result.
Critical Reflection of a Journal Article (USE THIS AS A GUIDE – REFERENCE THE SAME ARTICLE)
Summarizing research articles will help you to develop your critical thinking skills and your ability to express yourself in the written form. A research article is written to get across a lot of information quickly to a reader. Reading such articles can be tedious and sometimes frustrating unless you are familiar with scientific writing and the reasons for this style. Research articles are highly structured to make information easy to find. Unlike literary writing, scientific writing emphasizes quantifiable information; as a result, the writing is very lean and extra words are avoided.
A research article has the following major sections: Title Page, Abstract, Introductions, Method, Results, Discussion, References, Tables and Figures. An article summary highlights the information in the Introduction, Methods, Results, and Discussion. Before you can write such a summary, you need to read and understand the article.
Reading the Article
Remember that you are digesting information, not swallowing it whole. If an idea is relevant to your topic, you should be able to summarize it in your own words. If you can’t, you probably don’t understand it.
Article Conditions:
Article Critical Reflection Questions
Bibliographic Information:
Article Title: Spectrophotometric Determination of Vitamin C in Pharmaceutical Preparations using Ammonium Metavanadate.
Journal: Asian Journal of Research in Chemistry
Year: 2017 Volume: 10, Issue 3 Page Numbers: 341-344
Other Identifying information if not a journal:
How did you locate this article?
I found this article by logging onto the library database website. I clicked on “New search” and typed “Determination of vitamin C by titration” and I didn’t find anything I was interested in. So, I typed “Determination of vitamin C by spectrophotometry” and refined my search from newest to oldest, peer-reviewed, and articles only. This article was the third up out of 10,333 search results.
Summary:
The aim of this experiment was to test the Spectrophotometric method for measuring the concentration of vitamin C in pharmaceutical products such as Orange peel, Alma squash and Astymin C in order to compare the values obtained to the values on the manufacturer’s label. A Spectrophotometer is an instrument that passes light through a solution and measures how much light it has absorbed (Absorbance, A), but there has to be a color gradient based on the concentration of vitamin C. To accomplish this, ammonium metavanadate was added to the vitamin C, forming a green color which was bolder with increased vitamin C concentration. Using portions of known vitamin C concentration and getting their absorbances, a Beer’s law plot of Absorbance vs Concentration (μg/cm3). Unknown concentrations can be found using the equation of the trendline, of this graph: Absorbance, y = Slope, m (Concentration, x) + y-intercept, C.
(147 words)
Procedures:
In this experiment, each of the pharmaceutical products such as Orange peel, Alma squash and Astymin C were prepared differently based on their stock solution, to 1000ppm. For the Orange peel power, they weighed out 10 grams of the powder, diluted to 250 mL of distilled water, boiled for 5 hrs., filtered using Whatman 41 paper, and 5mL was used. For the Amla squash, 10 mL of stock was diluted to 100 mL and 10 mL was used. Lastly for the Astymin C drops, 0.1 mL of stock was diluted to 100 mL and 1 mL was used. Their recommended procedure was to use 1 mL of a solution of 1000 ppm vitamin C with 1 mL of a 0.5 % w/v ammonium metavanadate (prepared by dissolving 0.5g of ammonium metavanadate in 100 mL of distilled water) made to a 25 mL solution using distilled water. This solution was in the 5.0-6.0 pH range.
The maximum wavelength was 395 nm and this was gotten using an absorption spectra of the complex against a blank. It was found that the complex and color was unstable past four hours, however, the color showed instantly. A Beer’s law plot of Absorbance vs Concentration (μg/cm3) was done for known concentrations of vitamin C, and then used to find the concentration of the Unknowns using the equation of the trendline, of this graph: Absorbance, y = Slope, m (Concentration, x) + y-intercept, C. There was no table showing the data values for the known compounds. The results of this method was tested using the pH metric method to validate the results, but this was done only with the Orange squash sample.
For the tools, a. Boush and Lomb spectronic-20 was used with 1cm matched glass cell. Potassium chromate in KOH solution and potassium permanganate in sulphuric acid solution was used to calibrate the spectrophotometer, using an absorption spectra. This was not explained in detail. The pH meter was also calibrated, done pH 4.0, 7.0 and 9.2 buffer solutions.
Findings:
For the calibration curve the line was y= 0.009x + 0.014 with an R2 value of 0.9951. Because the R2 value is strong, the correlation is also strong.
For the Orange peel powder, the Spectrophotometric method gave 52.00 ± 4.62 μg/cm3 and the pH metric method 49.00 ± 3.35 μg/cm3 which is very close. There was no data on the manufacturer’s concentration.
For the Amlasquash (Nutri value) the Spectrophotometric method gave 63.33 ±5.76 μg/cm3 with a factory value of 65 μg/cm3, which is also close.
For Astymin C drops the Spectrophotometric value was 66.66 ± 5.77 μg/cm3 and the factory value was 70 μg/cm3 . No data for pH method.
The precision and accuracy of the method was tested by doing 8 replicate sampeles of each solution of 200.0 μg of vitamin C. The average was .94±0.028 at 95% confidence level. The standard deviation was 0.0394 and the variance was 0.0016.
Personal comments:
This was an adaptation of what was learned in class. I believe it was necessary to do both pH metric and spectrophotometric methods to test the result.
The post In your own words, describe the specifics of what this study involved. What where the samples? How were they grouped? What analysis did they complete? Under what conditions? For how long? What was measured? What was being compared? appeared first on Essay Hotline.
Why Work with Us
Top Quality and Well-Researched Papers
We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.
Professional and Experienced Academic Writers
We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.
Free Unlimited Revisions
If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.
Prompt Delivery and 100% Money-Back-Guarantee
All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.
Original & Confidential
We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.
24/7 Customer Support
Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Services
No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.
Essays
No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.
Admissions
Admission Essays & Business Writing Help
An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.
Reviews
Editing Support
Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.
Reviews
Revision Support
If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.