A kind of detection method of methanol content in acid
A technology of methanol content and detection methods, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as lack of and inability to adjust production processes
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Embodiment 1
[0045] Methanol Content Determination in Dilute Hydrochloric Acid
[0046] 1. Set the instrument conditions: set the instrument according to the conditions in Table 1.
[0047] 2. Preparation of standard solution: Add 5ml of methanol into a weighed and dried 50ml volumetric flask and weigh it. The weighed mass is 3.9107g. Dilute to the mark with ethanol and weigh, mix well, as the mother solution. Divide into 4 clean and dry 50ml volumetric flasks, add 0ml, 5ml, 10ml, 20ml of the above mother solution respectively, then add 25μL of isopropanol as internal standard, dilute to the mark with ethanol, and mix well.
[0048] 3. Determination of correction factor: determination of relative correction factor: start the gas chromatograph, and set the instrument according to the conditions in Table 1. After the instrument stabilized, the samples were injected and analyzed separately. After integration, the methanol peak area and the isopropanol peak area were obtained. A relative c...
Embodiment 2
[0053] Determination of Methanol Content in Weakly Acidic Water
[0054] 1. Set the instrument conditions: set the instrument according to the conditions in Table 1.
[0055] 2. Preparation of standard solution: Add 5ml of methanol into a weighed and dried 50ml volumetric flask and weigh it. The weighed mass is 3.8995g. Dilute to the mark with ethanol and weigh, mix well, as the mother solution. Divide into 4 clean and dry 50ml volumetric flasks, add 0ml, 5ml, 10ml, 20ml of the above mother solution respectively, then add 25μL of isopropanol as internal standard, dilute to the mark with ethanol, and mix well.
[0056] 3. Determination of correction factor: determination of relative correction factor: start the gas chromatograph, and set the instrument according to the conditions in Table 1. After the instrument stabilized, the samples were injected and analyzed separately. After integration, the methanol peak area and the isopropanol peak area were obtained. A relative cor...
Embodiment 3
[0061] Determination of Methanol Content in Dilute Sulfuric Acid
[0062] 1. Set the instrument conditions: set the instrument according to the conditions in Table 1.
[0063]2. Preparation of standard solution: Add 5ml of methanol into a weighed and dried 50ml volumetric flask and weigh it. The weighed mass is 3.8995g. Dilute to the mark with ethanol and weigh, mix well, as the mother solution. Divide into 4 clean and dry 50ml volumetric flasks, add 0ml, 5ml, 10ml, 20ml of the above mother solution respectively, then add 25μL of isopropanol as internal standard, dilute to the mark with ethanol, and mix well.
[0064] 3. Determination of correction factor: determination of relative correction factor: start the gas chromatograph, and set the instrument according to the conditions in Table 1. After the instrument stabilized, the samples were injected and analyzed separately. After integration, the methanol peak area and the isopropanol peak area were obtained. A relative cor...
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