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स्वर्ण संख्या को परिभाषित कीजिए।

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स्वर्ण संख्या (Gold Number) – “स्वर्ण संख्या मिलीग्राम में रक्षी कोलॉइड की वह मात्रा है जो किसी प्रमाणिक स्वर्ण कोलॉइडी विलयन के 10 मिली में उपस्थित होने पर उसका 1 मिली 10% NaCl विलयन द्वारा स्कन्दन होने से रोकती है।”

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