Continuous flow test system for chloride in water and test method
A flow detection and chloride technology, applied in the field of chemical analysis, can solve the problems of affecting the reproducibility of the measurement results, fear of bacteria, humic bacteria, and difficulty in judging the titration end point, so as to shorten the injection time, shorten the detection time, and reduce the number of samples. effect of dosage
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Embodiment 1
[0028] 1. Preparation of chloride standard solution: Dissolve 5.000g of sodium chloride reference substance in 800ml of distilled water, dilute to 1L with distilled water, and mix well. The solution is prepared successively so that the mass concentration is 500mg L respectively. -1 , 400 mg L -1 , 300 mg L -1 , 200 mg L -1 , 100 mg L -1 , 50 mg L -1 Chloride standard solution, dilute to 100ml.
[0029] Prepare color developer: dissolve 800mg of mercury thiocyanate, 35mg of ferric nitrate, 6.0ml of nitric acid with a mass fraction of 65% in 200ml of methanol, and dilute to 1L with distilled water;
[0030] Prepare nitric acid solution: Dilute 10ml of nitric acid with a mass fraction of 65% in 800ml of distilled water and dilute to 1L.
[0031] 2. The standard sample or the water sample to be tested is 0.05ml min -1 The flow rate of the sample injection is 50s introduced through the sample flow path 1, and the flow rate introduced through the nitric acid flow path 2 is 0....
Embodiment 2
[0037] 1. Preparation of chloride standard solution: Dissolve 5.000g of sodium chloride reference substance in 800ml of distilled water, dilute to 1L with distilled water, and mix well. The solution is prepared successively so that the mass concentration is 500mg L respectively. -1 , 400 mg L -1 , 300 mg L -1 , 200 mg L -1 , 100 mg L -1 , 50 mg L -1 Chloride standard solution, dilute to 100ml.
[0038] Prepare the color developer: dissolve 920mg of mercury thiocyanate, 40mg of ferric nitrate, 6.0ml of nitric acid with a mass fraction of 65% in 200ml of methanol, and dilute to 1L with distilled water;
[0039] Prepare nitric acid solution: Dilute 16ml of nitric acid with a mass fraction of 65% in 800ml of distilled water and dilute to 1L.
[0040] 2. The standard sample or the water sample to be tested is 0.08ml min -1 The flow rate of the sample injection is 70s introduced through the sample flow path 1, and the flow rate introduced through the nitric acid flow path 2 i...
Embodiment 3
[0046] 1. Preparation of chloride standard solution: Dissolve 5.000g of sodium chloride reference substance in 800ml of distilled water, dilute to 1L with distilled water, and mix well. The solution is prepared successively so that the mass concentration is 500mg L respectively. -1 , 400 mg L -1 , 300 mg L -1 , 200 mg L -1 , 100 mg L -1 , 50 mg L -1 Chloride standard solution, dilute to 100ml.
[0047] Prepare color developer: dissolve 1000mg of mercury thiocyanate, 50mg of ferric nitrate, 6.0ml of nitric acid with a mass fraction of 65% in 200ml of methanol, and dilute to 1L with distilled water;
[0048] Prepare nitric acid solution: Dilute 20ml of nitric acid with a mass fraction of 65% in 800ml of distilled water and dilute to 1L.
[0049] 2. The standard sample or water sample to be tested is 1.0ml min -1 The flow rate of the sample injection is 100s introduced through the sample flow path 1, and the flow rate introduced through the nitric acid flow path 2 is 2.0ml...
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