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Method for detecting organic arsenic, trivalent arsenic and pentavalent arsenic content in feed and raw material

A detection method and technology of trivalent arsenic, applied in the detection of trivalent arsenic and pentavalent arsenic, organic arsenic in animal feed and raw materials, detection of arsenic content, can solve the problem of indistinguishable form of arsenic, and achieve simple operation Effect

Inactive Publication Date: 2018-08-17
GUANGZHOU AONONG BIOTECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This method can only quantitatively detect the content of total arsenic in the sample, but cannot distinguish the form of arsenic in the sample

Method used

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  • Method for detecting organic arsenic, trivalent arsenic and pentavalent arsenic content in feed and raw material
  • Method for detecting organic arsenic, trivalent arsenic and pentavalent arsenic content in feed and raw material
  • Method for detecting organic arsenic, trivalent arsenic and pentavalent arsenic content in feed and raw material

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Experimental program
Comparison scheme
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Embodiment 1

[0060] The instrument and instrument condition that present embodiment adopts are as follows:

[0061] 1. Instruments and equipment

[0062] Atomic fluorescence spectrometer, electronic balance (accurate to 0.1mg), laboratory routine glassware, tall beaker, watch glass, porcelain crucible.

[0063] 2. Instrument conditions

[0064] Hollow Cathode Lamps: Arsenic

[0065] Photomultiplier tube negative high voltage (V): 270

[0066] Atomizer height (mm): 8

[0067] Lamp current (mA): 60

[0068] Carrier / Shield Gas: Argon

[0069] Carrier gas flow rate (mL / min): 300

[0070] Shielding gas flow (mL / min): 800

[0071] Injection volume (mL): 0.5

[0072] Measurement conditions:

[0073] Reading time (s): 10

[0074] Reading method: peak area

[0075] Measurement method: external standard standard curve method

[0076] Delay time (s): 1.0

[0077] Table 1 Intermittent pump parameters

[0078] serial number

time(s)

Pump speed(rpm)

reading

1

10...

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Abstract

The invention discloses a method for detecting o organic arsenic, trivalent arsenic and pentavalent arsenic content in a feed and a raw material, and the method comprises the following steps: step 1,taking different volumes of arsenic standard solutions, adding thiourea-ascorbic acid for reduction, and diluting to a fixed volume, loading the solutions into an atomic fluorescence spectrometer to analyze and detect to obtaincorresponding fluorescence values, drawing a standard curve according to concentrations and the fluorescence values, and calculating a standard curve equation; step 2, taking three feed or raw material samples, labeling as A, B and C, respectively, performing the following three groups of steps of calculating the sample A to obtain the total arsenic content, calculatingthe sample B to obtain the total inorganic acid content and calculating the sample C to obtain the trivalent arsenic content; and step 3, calculating the total organic arsenic content and the pentavalent arsenic content. The method is simple in operation and can conveniently detect the total organic arsenic, trivalent arsenic and pentavalent arsenic content in the feed and raw material.

Description

technical field [0001] The invention relates to the technical field of chemical component detection, in particular to a method for detecting arsenic content, in particular to a method for detecting organic arsenic, trivalent arsenic and pentavalent arsenic in animal feed and raw materials. Background technique [0002] Arsenic is a natural element widely distributed in the atmosphere, water and land. It is divided into inorganic arsenic and organic arsenic in form, and inorganic arsenic is highly toxic. Inorganic arsenic can be divided into trivalent arsenic and pentavalent arsenic, and trivalent arsenic is more toxic than pentavalent arsenic. [0003] Long-term exposure to inorganic arsenic, mainly through drinking contaminated water, eating food processed with such water, and food irrigated with arsenic-rich water, can lead to chronic arsenic poisoning. [0004] For the feed industry, organic arsenic and inorganic arsenic need to be treated differently. Inorganic arsenic ...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/6404
Inventor 陈淋敏张书金王少青杨伟春刘小成汤建平周通张敬学李兵
Owner GUANGZHOU AONONG BIOTECH
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