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ارزیابی انطباق نتایج آزمون اندازهگیری pH در آزمایشگاه غذایی با استفاده ازمحاسبات عدمقطعیت | ||
| تحقیقات مهندسی صنایع غذایی | ||
| دوره 23، شماره 1 - شماره پیاپی 76، شهریور 1403، صفحه 147-164 اصل مقاله (1010.14 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/fooder.2024.364318.1380 | ||
| نویسنده | ||
| البرز حاجی خانی* | ||
| استادیار | ||
| چکیده | ||
| فرایند ارزیابی انطباق، به اندازهگیری به عنوان منبع اصلی اطلاعات متکی است. در هر اندازهگیری نتیجه بهدستآمده همیشه دارای عدمقطعیت است. اندازهگیری pH از مهمترین و رایجترین آزمونهای آزمایشگاههای غذایی است، نخستین گام تخمین عدم قطعیت، تعیین مدل ریاضی برای اندازهگیری است و چون در هیچیک از روشهای آزمون ذکر شده برای اندازهگیری pH، بر خلاف اکثر آزمونهای دیگر، مدل ریاضی و فرمول محاسباتی وجود ندارد این آزمون برای مطالعه انتخاب شد. برای تخمین عدم قطعیت اندازهگیری، از نرمافزار Qmsys GUM استفاده شد. نتیجۀ محاسبات نرمافزار با پاسخ دستگاه مقایسه شد. مدل ریاضی تعریف شده برای نرمافزار، مقدار pH نمونه کیک را6.985 محاسبه کرد که با عدد خوانده شده توسط دستگاه pHمتر مطابق بود و بیانگر درست نوشته شدن مدل ریاضی است. میزان عدم قطعیت بسط یافته برای آزمون اندازهگیری pH، در سطح اطمینان 95.45درصد، به میزان0.029±، معادل 0.42± درصد برآورد گردید که در ارزیابی انطباق نتایج استفاده خواهد شد. | ||
| کلیدواژهها | ||
| روش GUM؛ قواعد تصمیمگیری؛ نرمافزار Qmsys GUM | ||
| عنوان مقاله [English] | ||
| Conformity assessment of pH measurement test results in food laboratory using uncertainty calculations | ||
| نویسندگان [English] | ||
| alborz hajihkhani | ||
| استادیار | ||
| چکیده [English] | ||
| The conformity assessment process relies on measurement as the primary source of information. In any measurement, the obtained result always has uncertainty. pH measurement is one of the most important and common tests in food laboratories, since the first step in uncertainty estimation is to determine the mathematical model for measurement, and because in none of the test methods mentioned, in order to measure pH, unlike most other tests, mathematical models and formulas are used. There is no calculation. This test was selected for study. To estimate the measurement uncertainty, Qmsys GUM software was used. The result of the calculations performed by the software was compared with the response of the device. The mathematical model defined for the software calculated the pH value of the cake sample as 6.985, which was consistent with the number read by the pH meter and indicated that the mathematical model was correctly written. The expanded uncertainty level for the pH measurement test, at the 95.45% confidence level, was estimated as ±0.029, equivalent to ±0.42%, which is used in evaluating the conformity of the results. | ||
| کلیدواژهها [English] | ||
| GUM method, decision rules, Qmsys GUM software | ||
| مراجع | ||
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