Give the details of the preservation techniques used for water samples.
Proper preservation of water samples is essential to ensure that the chemical, physical, and biological characteristics at the time of sampling are maintained until analysis. Preservation techniques depend on the nature of the analyte and the intended analytical method. The most common approach is temperature control; water samples are generally stored at low temperatures, around ______ _______ _________ _________ _______ _________ ______ ____ __________.
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How does surface area of the stationary phase affect the separation in coloumn chromatography? What should be the sample to absorbent ratio so that clear separations are obtained?
transitions in vibrational energy levels of the molecule.
उपयुक्त आरेख की सहायता से मानक प्रतिदर्शों के उपयोग सहित वर्णलेख के विकास को समझाइए।
From the following data, calculate the molar conductivity of NaCl in aqueous solution:
Conductivity of 4.0 × 10-4 mol dm-3 NaCl solution = 6.20 × 10-3 S m⁻¹
Conductivity of the water = 0.05 × 10-3 S m⁻¹.
A mixture of CaO and CaCO3 is analysed by TGA. The result indicates that mass of the sample decreases from 320.8 mg to 230.6 mg only between 650°C and 850°C. Calculate the percentage of calcium carbonate in the mixture.
स्तब्ध प्रावस्था का पृष्ठीय क्षेत्रफल स्तंभ वर्णलेखिकी में पृथक्करण को कैसे प्रभावित करता है? स्पष्ट पृथक्करण प्राप्त करने के लिए प्रतिदर्श और अधिशोषक के बीच अनुपात क्या होना चाहिए?
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