کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1243350 1495797 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization and validation of a method for the determination of the refractive index of milk serum based on the reaction between milk and copper(II) sulfate to detect milk dilutions
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Optimization and validation of a method for the determination of the refractive index of milk serum based on the reaction between milk and copper(II) sulfate to detect milk dilutions
چکیده انگلیسی


• Determination of the refractive index of milk serum by copper(II) sulfate method.
• A method to detect milk dilutions was modernized and it is discussed in details.
• The method was optimized and validated, making it simple, fast and robust.
• Optimized method showed an accuracy of 0.4% and a quadrupled analytical throughput.

We report the use of a method to determine the refractive index of copper(II) serum (RICS) in milk as a tool to detect the fraudulent addition of water. This practice is highly profitable, unlawful, and difficult to deter. The method was optimized and validated and is simple, fast and robust. The optimized method yielded statistically equivalent results compared to the reference method with an accuracy of 0.4% and quadrupled analytical throughput. Trueness, precision (repeatability and intermediate precision) and ruggedness are determined to be satisfactory at a 95.45% confidence level. The expanded uncertainty of the measurement was ±0.38 °Zeiss at the 95.45% confidence level (k=3.30), corresponding to 1.03% of the minimum measurement expected in adequate samples (>37.00 °Zeiss).

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 138, 1 June 2015, Pages 196–202
نویسندگان
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