Gas chromatography-mass spectrometry method for measuring three trace single halogenated methylbenzoic acids in source water
A technology for substituting methyl benzoic acid and methyl benzoic acid, which is applied in the field of analysis and detection of harmful trace substances, and can solve problems such as missing
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Embodiment 1
[0073] In Example 1, Minjiang River water was used as the sample matrix to carry out standard recovery experiments to verify the feasibility of the method of the present invention. The water samples were collected from the water intake point of the Taijiang section of the Fuzhou Waterworks. After collection, they were stored at 4°C for later use. Proceed as follows:
[0074] 1. Adsorption of compounds:
[0075] Add 200mL of tap water to a 500mL separatory funnel, and add 5.00mL of three compound standard solutions with a concentration of 10.0μg / L, 20.0μg / L and 200.0μg / L respectively, to prepare a three-level six-parallel For the spiked sample, add 0.40g magnesium-aluminum hydrotalcite roasted product adsorbent, and shake for 15min to make the adsorbent adsorb;
[0076] 2. Desorption of compounds:
[0077] Add the water in the separatory funnel to a 50mL stoppered centrifuge tube and centrifuge at 4500rpm for 3min to separate the solid adsorbent from the aqueous solution and ...
Embodiment 2
[0086] In Example 2, reservoir water was used as the sample matrix to carry out standard addition recovery experiments to verify the feasibility of the method of the present invention. The water samples were collected from the Dongzhang Reservoir in Fuqing, and were stored at 4°C for later use. Filtered before use and processed according to the following steps :
[0087] 1. Adsorption of compounds:
[0088] Add 200mL of well water to a 500mL separating funnel, and add 5.00mL of three compound standard solutions with concentrations of 10.0μg / L, 20.0μg / L and 200.0μg / L to each of them to prepare three levels of six parallel Then add 0.40g magnesium aluminum type hydrotalcite roasting product adsorbent, and shake for 15min to make the adsorbent adsorb;
[0089] 2. Desorption of compounds:
[0090] Add the water in the separatory funnel to a 50mL stoppered centrifuge tube and centrifuge at 4500rpm for 3min to separate the solid adsorbent from the aqueous solution and discard the ...
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