Gas chromatography-mass spectrometry method of measuring three types of trace tetrahalogenhydroquinone in water of water source.
A technology of gas chromatography and tetrahalocyanoquinone is applied in the field of analysis and detection of harmful trace substances to achieve the effect of removing the interference of organic impurities and efficiently enriching
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Embodiment 1
[0077] In Example 1, Minjiang River water was used as the sample matrix to carry out the standard addition recovery experiment to verify the feasibility of the method of the present invention, and it was processed according to the following steps:
[0078] 1. Adsorption of compounds:
[0079] Minjiang water was taken from the water intake of Taijiang section of Fuzhou Waterworks. The water samples were collected and filtered and stored at 4°C for later use. Before use, the water was filtered and the pH was adjusted to about 7.0.
[0080] Add 200mL of Minjiang water into a 500mL separatory funnel, and add 5.00mL of standard solutions of three compounds with concentrations of 10.0μg / L, 20.0μg / L and 200.0μg / L to prepare three levels of six Add standard samples in parallel, then add 0.40g benzenesulfonate-magnesium aluminum hydrotalcite adsorbent, shake for 15min to make the adsorbent adsorb;
[0081] 2. Desorption of compounds:
[0082] Add the water in the separatory funnel to...
Embodiment 2
[0091] This embodiment 2 adopts reservoir water as the sample matrix to carry out the standard addition recovery experiment to verify the feasibility of the method of the present invention, according to the following steps:
[0092] 1. Adsorption of compounds:
[0093] Reservoir water was taken from Dongzhang Reservoir in Fuqing City. Water samples were collected and filtered and stored at 4°C for later use. Before use, the water was filtered and its pH was adjusted to about 7.0.
[0094] Add 200mL of water sample to a 500mL separatory 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 For the positive sample, add 0.40g of benzenesulfonate-magnesium aluminum hydrotalcite adsorbent, and shake for 15min to make the adsorbent adsorb;
[0095] 2. Desorption of compounds:
[0096] Add the water in the separatory funnel to a 50mL stoppered centrifuge tube and ce...
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