Quick determination method of speciation mercury in liquefied natural gases

A technology for rapid determination of liquefied natural gas, applied to measuring devices, instruments, scientific instruments, etc., can solve problems such as troublesome determination methods of mercury in the form

Inactive Publication Date: 2015-08-19
NANTONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF THE PEOPLES REPUBLIC OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The determination method of form mercury in liquefied natural gas in the prior art is cumbersome and slow, and needs to be further improved

Method used

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  • Quick determination method of speciation mercury in liquefied natural gases
  • Quick determination method of speciation mercury in liquefied natural gases
  • Quick determination method of speciation mercury in liquefied natural gases

Examples

Experimental program
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Embodiment Construction

[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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Abstract

The invention discloses a quick determination method of speciation mercury in liquefied natural gases. The quick determination method includes steps of solution preparation, sample pretreatment, HPLC-ICP-MS instrument condition and result determination, result calculation, etc. The quick determination method of speciation mercury in liquefied natural gases is convenient, quick and accurate.

Description

technical field [0001] The invention relates to a rapid determination method for form mercury in liquefied natural gas. Background technique [0002] The determination method of form mercury in liquefied natural gas in the prior art is cumbersome and slow, and needs to be further improved. Contents of the invention [0003] The purpose of the present invention is to provide a convenient and rapid method for the rapid determination of form mercury in liquefied natural gas. [0004] Technical solution of the present invention is: [0005] A method for rapid determination of form mercury in liquefied natural gas is characterized in that it comprises the following steps: [0006] (1) Preparation of the solution [0007] (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 con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/8859
Inventor 张爱平王红卫洪华李建军王超颖丁黎李国伟熊伟王爱国江涛侯晋袁建国
Owner NANTONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF THE PEOPLES REPUBLIC OF CHINA
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