Method for quickly and accurately determining 4 heavy metals in cigarette smoke
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A technology for accurate measurement of cigarette smoke, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve the problem of inability to measure heavy metal content in smoke
Inactive Publication Date: 2013-09-11
HONGYUN HONGHE TOBACCO (GRP) CO LTD
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This method can only capture heavy metals in the particulate matter of f
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Embodiment 1
[0029] Main reagents and instruments used:
[0030] 30% hydrogen peroxide, (excellent grade, Guangdong Chemical Reagent No. type ultrapure water device), lead, cadmium, arsenic, chromium standard solution (National Center for Standardized Materials, 1000μg / g), high-purity Ar 2 , ELAN9000 Inductively Coupled Plasma Mass Spectrometry (ICP-MS) instrument (Perkin Elmer SCIEX, USA), Multiwave microwave digestion instrument (Anton Paar, Austria), analytical balance (sensitivity 0.1mg), constant temperature oven (BINDER, Germany).
[0031] All glassware used was treated with 10% HNO 3 Soaking to remove metal treatment; 10 common cigarette samples.
[0032] 1. Establishment of standard working curve
[0033] 1.1 Establishment of lead standard working curve
[0034] 1.1.1 Take 20ml of 1000μg / g lead standard solution, dilute to 200ml with distilled water, and make 100μg / g lead standard solution.
[0035] 1.1.2 Take 10ml, 20ml, 30ml, 40ml, 50ml of 100μg / g lead standard solution resp...
Embodiment 2
[0083] Repeat Example 1, with the following differences: use a special polytetrafluoroethylene digestion tank instead of a stoppered Erlenmeyer flask for digestion.
[0084] The results show that the special polytetrafluoroethylene digestion tank and the corked conical flask have basically the same results after digestion, but the cost is more than 10 times higher.
Embodiment 3
[0086] Example 1 was repeated with the following difference: no cooling was performed during the digestion. The results showed that continuous high-temperature digestion would cause tobacco and soot to form a paste, which would stick to the wall of the triangular flask, resulting in incomplete digestion.
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Abstract
The invention discloses a method for quickly and accurately determining 4 heavy metals in cigarette smoke. The method comprises the following steps of: accurately weighing a cigarette powder sample; placing the cigarette powder sample in a triangular flask with a stopper; adding 5ml of nitric acid and 5ml of 30% of hydrogen peroxide; digesting by heating in medium flame for 5 minutes, cooling for 2 minutes, heating in medium flame for 5 minutes and heating in high flame for 15 minutes; taking out after cooling, discoloring by active carbon, filtering and transferring to a sample flask for measuring; guiding a sample solution to an inductive coupling plasma emission spectrum mass spectrometer for detecting, reading out the content of heavy metals into the to-be-measured sample cut cigarette and cigarette ash; representing the content of the heavy metals in cigarette smoke of the cigarette by using a subtraction method according to the difference value between the cut cigarette and the content of the heavy metals in the cigarette ash. The method for quickly and accurately determining the 4 heavy metals in the cigarette smoke is accurate in test, simple to operate, high in flexibility and good in repeatability. Moreover, the method is suitable for the cigarette industry and carrying out quantitative measurement onto the heavy metals in the cigarette sample, so that the blank in the technical field is filled up.
Description
technical field [0001] The invention belongs to the technical field of cigarette detection, and in particular relates to a method for rapidly and accurately measuring the contents of four heavy metals in cigarette smoke by using ICP-MS (inductively coupled plasma emission spectrometer) and subtraction method. Background technique [0002] Among the ingredients of cigarettes, in addition to common harmful substances such as tobacco tar and nicotine, heavy metals such as lead, cadmium, arsenic, and chromium can also cause harm to human health. The heavy metals in the smoke from burning cigarettes will exist in the form of aerosols and enter the human body. When the cigarette is burned, the temperature will reach 300°C, forming smoke that is easier to absorb than ordinary food, and will cause greater harm to the human body under the same content. And because the fluidity of the flue gas is extremely strong, the harm of second-hand smoke is also quite serious. As, Cd, Cr, Pb, ...
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