QuestionQuestion

For this assignment, you are instructed to select and read two research articles appearing this calendar year in either the journal Analytical Chemistry or Analyst. After carefully perusing the article, you will write a 2 page summary (1.25 line spacing, 12 point font, Times New Roman) of the research, including the following details, in your own words:
(i) The title and reference to the work, including a hyperlink where the article can be found
(ii) an overall summary of the work performed and the results achieved
(iii) a description of the problem being solved and the approach used
(iv) a critical evaluation of the work, including any strengths and weaknesses you perceive
(v) a discussion of the novelty and significance of the work
(vi) a proposal for how the work could be expanded, improved upon, or extended
You may include drawings, pictures, and/or equations, as appropriate. These do not count against the 2-page limit.

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“Measurement of Estradiol in Human Serum by LC-MS/MS Using a Novel EstrogenSpecific Derivatization Reagent” P.

II. Quantitative determination of 17β-estradiol (E2) is important in clinical settings and traditionally it was done by immunoassays. Due to the sensitivity issues and method biasness, researchers moved towards mass spectrometric methods, especially, liquid chromatography tandem mass spectrometry (LC-MS/MS). In this article, an LC/MS/MS method was developed to quantify estradiol and this method uses a novel estrogen specific derivatization reagent, 1,2dimethylimidazole-5-sulfonyl chloride (DMIS). With E2, this method simultaneously quantifies underivatized testosterone (T) and dihydrotestosterone (DHT). Optimum derivatization conditions were investigated and the reaction mixture was analyzed in 9.5 min gradient run. Detection was achieved by a triple quadrupole mass spectrometer with Atmospheric pressure photoionization. Analytical method validation parameters such as linearity, precision, accuracy, extraction recovery, matrix effect, stability, carry-over, selectivity were determined. They also compared the results from this novel derivatization method with the standard LC/MS/MS technique by analyzing 120 samples from a clinical study and certified E2 serum reference materials BCR-576, BCR-577, and BCR-578. The main purpose of this project is to increase the sensitivity of E2 quantification. The limits of quantification (LOQ) were determined to be E2 (0.5pg/mL), T (25pg/mL), and DHT (0.10 ng/mL). Therefore this method was capable of analyzing E2 in samples such as serum from men, children, and postmenopausal women which have E2 concentrations in low pg/mL range....

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