Detection method for mineral oil in sludge

A detection method and mineral oil technology, applied in the preparation of test samples, color/spectral characteristic measurement, etc., can solve problems such as inability to guide production and disposal, cumbersome process, and untimely data, so as to achieve a novel and unique detection method, Determination of the effect of fast and accurate, simple operation

Inactive Publication Date: 2012-07-25
BEIJING BBMG BEISHUI ENVIROMENTAL TECH CO LTD
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Problems solved by technology

The extraction takes a long time, the pre-work (weighing, acidification, curing) process is cumbersome, the data is not timely, and the lag
For on-site disposal, data cannot be provided in a timely and rapid manner, and it cannot play a role in guiding production disposal

Method used

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  • Detection method for mineral oil in sludge
  • Detection method for mineral oil in sludge

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Embodiment Construction

[0041] The embodiment of the detection method of mineral oil in a kind of sludge of the present invention, comprises the following steps:

[0042] 1. Establish a standard curve:

[0043] 1. Prepare the oil standard use solution: use petroleum ether as the solvent for the oil standard (1.000mg / ml) to prepare a solution with a concentration of ρ=500mg / L;

[0044] 2. Preparation of samples:

[0045] Absorb 0.5ml, 1.0ml, 2.0ml, 4.0ml, 8.0ml, 13.0ml of the applicable oil standard solution into six 25ml colorimetric tubes, and then dilute it to the 25ml mark with petroleum ether to make 6 different Concentration of the standard sample, and then input the concentration of each standard sample into the computer; in this embodiment, the different concentrations of the 6 standard samples are: 10mg / L, 20mg / L, 40mg / L, 80mg / L, 160mg / L L, 260mg / L.

[0046] 3. Analyze samples and establish a standard curve

[0047] Set the UV spectrophotometer at the wavelength of 225nm, adjust the UV sp...

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Abstract

The invention relates to a detection method for mineral oil in sludge, which comprises the following steps of: preparing a group of standard samples in different concentrations, entering the concentration of each standard sample to a computer, determining absorbance of all of the standard samples in sequence on an ultraviolet spectrophotometer, establishing a standard curve between the concentrations and the absorbance on the computer, taking a sludge sample for dryness, adding petroleum ether to dilute, putting the sludge sample into the ultraviolet spectrophotometer showing the absorbance of the sample after performing ultrasound and extraction by an ultrasonic instrument and metering constant volume, obtaining the concentration of the detected sample according to the standard curve, and calculating the concentration of the mineral oil in the sludge by using a formula at last. The detection method has the advantages that an ultrasound extraction technology is used to extract the mineral oil from the sludge sample sufficiently in a short time period in the detection method, the data is accurate, the time period is short, the operation is simple, the timeliness is realized, the total time for detecting a single sample does not exceed 3h, and the guidance of field sludge handling is facilitated.

Description

technical field [0001] The invention relates to a detection method of mineral oil, in particular to a detection method of mineral oil in sludge. Background technique [0002] CJ / T221-2005 Standard CJ / T221-2005 standard for the detection of mineral oil in the sludge inspection method of urban sewage treatment plants adopts the method of Soxhlet extraction to separate the mineral oil in the sludge. The extraction time by ultraviolet spectrophotometry is not less than 6.5h. For some sludge with high oil content, the extraction time should be extended until the petroleum ether in the extraction cylinder is tested with filter paper and there is no oil stain. Including the early acidification and solidification work, the whole experimental process will take at least 1-2 days. The extraction takes a long time, the pre-work (weighing, acidification, curing) process is cumbersome, the data is not timely, and lags behind. For on-site disposal, data cannot be provided in a timely and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N1/38
Inventor 张觊赵玥王义春
Owner BEIJING BBMG BEISHUI ENVIROMENTAL TECH CO LTD
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