Method for measuring hydrogen sulfide in mainstream cigarette smoke
A technology for mainstream cigarette smoke and a determination method, applied in the field of ion chromatography determination, can solve the problems of difficulty in comprehensively capturing hydrogen sulfide, inability to determine hydrogen sulfide, etc., and achieves the effects of avoiding oxidation loss, fast speed, and accurate determination method.
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Embodiment 1
[0041] Embodiment 1 Qualitative detection method
[0042] Preparation of analysis samples: After the cigarette laboratory samples are balanced at temperature (22±2)°C and relative humidity (60±5)% for 48 hours, according to the draw resistance (average value ±50) Pa, mass (average value ±20) The parameters of mg require screening to obtain the analysis sample;
[0043] Preparation of eluent: Weigh 32.81g of anhydrous sodium acetate dissolved in 800mL of ultrapure water, filter through a 0.22μm Nylon membrane and transfer to a 1L plastic volumetric flask; then pipette 5.2mL of 50% NaOH and Put 5mL of ethylenediamine into a plastic volumetric flask, adjust the volume to 1000mL with ultrapure water, then transfer it to a polyethylene eluent bottle, and place it under 40kpa nitrogen protection to obtain 100 mmol / L sodium hydroxide , 400 mmol / L sodium acetate, 0.5% ethylenediamine eluent;
[0044] Preparation of diluent for standard solution: Weigh 0.400g of analytical pure sodiu...
Embodiment 2
[0056] Embodiment 2 Quantitative detection method
[0057] Drawing of standard curve
[0058] Samples and reagents were prepared respectively according to the method in Example 1.
[0059] Dilute the standard stock solution with the diluent of the standard solution into a concentration range of about 0.2 μg / mL to 10.0 μg / mL, and a series of standard working solutions of sulfide ions with no less than 5 gradients. To draw a standard curve, R 2 Must not be less than 0.99. The standard curve is: nC*min=0.0269C-0.8476, r=0.99928 such as Figure 4 shown.
[0060] quantitative test
[0061] Preparation of capture solution and connection of capture bottle and smoking machine: Accurately weigh 0.176g of analytically pure ascorbic acid, add it to the capture bottle, and then accurately pipette 50mL of pre-prepared capture solution, and add it to the capture bottle. At this time, the concentration of the trapping solution is: 10mmol / L-20mmol / L sodium hydroxide, 400mmol / L sodium ac...
Embodiment 3
[0073] Example 3 The methodological verification of the assay method when one is sucked
[0074] Sample preparation, reagent preparation, chromatography and detection parameters are as in Example 1 or 2.
[0075] Smoking machine preparation: Preheat and adjust the smoking machine to the standby state according to the operation method of the instrument and the requirements of GB / T 19609 standard conditions; connect the filter holder with a 44mm glass fiber filter in series to intercept the mainstream smoke particulate matter;
[0076] Standard curve drawing: Dilute the standard stock solution with the standard solution diluent into a standard working solution of sulfide ion series with a concentration range of about 0.2μg / mL ~ 10.0μg / mL and no less than 5 gradients, and immediately follow the chromatographic and Analyze the detection conditions and draw the standard curve, R 2 Not less than 0.99;
[0077] Preparation of capture solution and connection of capture bottle and s...
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