A rapid determination method of form mercury in liquefied natural gas
A technology for liquefied natural gas and rapid determination, which can be used in measurement devices, instruments, scientific instruments, etc.
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[0044] A method for rapid determination of form mercury in liquefied natural gas comprises the following steps:
[0045] (1) Preparation of the solution
[0046] (1) 10mmol / L L-cysteine solution, i.e. solution A: Accurately weigh 1.2116g L-cysteine in a 100mL beaker, add ultrapure water to dissolve it, transfer it to a 1000mL beaker, and use 1:1 Adjust the volume ratio of hydrochloric acid to pH = 2.3, after constant volume of 1000mL volumetric flask, filter through 0.22μm filter membrane to obtain solution A, and store it away from light;
[0047] (2) 90% L-cysteine + 10% methanol mixed solution, i.e. solution B: pipette 900 mL of solution A and 100 mL of methanol solution, oscillate and mix to obtain solution B, set aside;
[0048] (3) 95.09 mg / mL phenylmercury standard solution, i.e. solution C: Accurately weigh 0.0158 phenylmercury chloride, place it in a 100mL volumetric flask, add methanol to constant volume to prepare a phenylmercury standard solution, i.e. solut...
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Application Information
- IPC
- G01N30/88
- CPC
- G01N30/88; G01N2030/8859
- Inventors
- 张爱平; 王红卫