Method for pre-treating trace charged pollutants in sewage
A technology for pretreatment and pollutants, applied in the field of water pollution detection, to achieve the effect of expanding the minimum detection limit, good pretreatment enrichment effect, and wide application range
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Embodiment 1
[0023] This embodiment is applied to the pretreatment of trace heavy metal pollutants in water, and the trace heavy metal pollutants (copper, cobalt, nickel) contained in the sample are pretreated. The specific steps are as follows:
[0024] (1) Enrichment: Add 50ml of the water sample to be tested containing trace heavy metal pollutants (copper, cobalt, nickel) (the content of copper, cobalt and nickel is 0.05mg / l) into the container of self-made electro-enhanced solid-phase microextraction , the PVDF hollow fiber membrane is placed on a platinum wire electrode with an inner diameter of 0.5 mm, and the power is applied to apply a voltage to enrich trace heavy metal pollutants.
[0025] (2) Elution: the PVDF hollow fiber membrane obtained after the enrichment in step (1) is added to the acetic acid-sodium acetate buffer solution of pH=5.6, and the heavy metal pollutants are eluted from the fiber by acid solution, and the washed dehydration.
[0026] (3) Detection: Add xyleno...
Embodiment 2
[0028] This embodiment is applied to the pretreatment of trace amounts of macromolecular organic pollutants in water, and the pretreatment is performed on trace amounts of organic amines contained in the sample. The specific steps are as follows:
[0029] (1) Enrichment: 50ml of the water sample to be tested containing traces of aniline pollutants was added to a self-made electro-enhanced solid-phase microextraction container, and the PFS hollow fiber membrane was placed on a platinum wire electrode with an inner diameter of 0.5mm. A voltage is applied through the power supply to enrich trace aniline pollutants.
[0030] (2) Elution: add the PFS hollow fiber membrane obtained after the enrichment in step (1) into an ethanol solution, use ultrasonic elution to elute aniline from the fiber, and collect the eluate.
[0031] (3) Detection: UV spectrophotometric analysis is carried out to obtain the UV absorbance of the enriched ions; the absorbance is sorted out, analyzed and pre...
Embodiment 3
[0033] This embodiment is applied to the pretreatment of trace amounts of macromolecular organic pollutants in water, and the pretreatment is performed on trace amounts of organic acids contained in samples. The specific steps are as follows:
[0034] (1) Enrichment: Add 50ml of the water sample to be tested containing traces of phthalic acid pollutants into a self-made electro-enhanced solid-phase microextraction container, and place the resin hollow fiber membrane on a platinum wire electrode with an inner diameter of 0.5mm On, turn on the power supply and apply voltage to enrich trace phthalic acid pollutants.
[0035] (2) Elution: adding the resin hollow fiber membrane obtained after the enrichment in step (1) into an ethanol solution, using electroelution to elute phthalic acid from the fiber, and collecting the eluate.
[0036] (3) Detection: UV spectrophotometric analysis is carried out to obtain the UV absorbance of the enriched ions; the absorbance is sorted out, ana...
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Abstract
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