9 حموضة العصير

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عشان تعرف تقدر حموضة العصير بكفاءة وبكل سهولة • الحموضة الكلية Total Acidity: • هناك مصطلحان متلازمان في تحليل الأغذية هما رقم الحموضة pH والحموضة الكلية (الحموضة المُعايرة) titratable وكلاهما يقدر بطريقة مختلفة عن الأخر حيث يقدر رقم الحموضة بجهاز pH meter بينما تقدر الحموضة الكلية بعملية المعايرة Titration بواسطة محلول قلوي معلوم التركيز العياري وتعتمد على تغيير الرقم الهيدروجيني لتصل إلى 8.1 أو عن طريق تغيير لون عينة عصير الي اللون الوردي عند استخدام دليل فينول فيثالين phenolnaphthaline ورقم الحموضة pH والحموضة الكلية يؤثران علي جودة منتجات الفاكهه حيث تدل نسبة الحموضة ونوعيتها على حدوث فساد في بعض المنتجات 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