Method for detecting bio-available cadmium in soil

A biologically effective and soil-based technology, applied in the direction of measuring devices, test sample preparation, sampling, etc., can solve the problems of cross-phase, mutual interference, accurate extraction and detection of cadmium content, etc.

CN109142004AActive Publication Date: 2019-01-04JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-01-04

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Abstract

A method for detecting bio-available cadmium in soil includes steps: S100, sample collection and pretreatment, to be more specific, sampling soil, subjecting sampled soil to air drying at the room temperature, grinding, and filtering through a 200-mesh screen to obtain a soil sample; weighing 1-5g of the soil sample, adding into a 250mL polytetrafluoroethylene centrifugal cup, adding 25mL of 1mol / L ammonium chloride solution and 25mL of 80% ethanol solution, cleaning through an ultrasonic cleaner, centrifuging through a centrifuge, filtering supernatant through a filter membrane to obtain extract liquid, and adopting HNO3 solution in concentration of 1% to obtain a constant volume; S200, determination of the concentration of bio-available cadmium in the extract liquid, to be more specific,adopting an inductively coupled plasma source mass spectrometer for creating a standard curve for determining different concentrations of bio-available cadmium according to an inductively coupled plasma mass spectrometry method; adopting the inductively coupled plasma source mass spectrometer for measuring concentration of bio-available cadmium in the extract liquid according to the standard curve; S300, result analysis, to be more specific, calculating the content of bio-available cadmium in the soil sample according to measured soil sample mass and measured extract liquid concentration.
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Description

technical field

[0001] The invention relates to the technical field of soil environmental protection detection, in particular to a method for detecting biologically available cadmium in soil. Background technique

[0002] The environmental behavior and ecological effects of heavy metal elements do not depend on their total amount in environmental matrix such as soil or sediment, but mainly depend on their existing phase and corresponding quantity ratio. The different chemical forms of metals in the environmental matrix determine their mobility and bioavailability; the research on heavy metals in bioavailable state can provide a reliable basis for evaluating environmental pollution, establishing environmental standards, and preventing and remediating environmental pollution. Cadmium is a widely distributed metal element, which is located in the IIB and fifth period of the periodic table of elements. It is mainly used in the battery industry, followed by pigments, paints and e...

Examples

Embodiment Construction

[0094]In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present in...