Method for simultaneously detecting various organic acid radicals and inorganic anions in harmful salt of cultural relics

A technology of inorganic anions and organic acid radicals, applied in the direction of measuring devices, material separation, instruments, etc., can solve problems such as troublesome operation, many interfering ions, and difficulty in determining the end point of titration, etc., and achieve the effect of easy operation and simple sample processing

Pending Publication Date: 2021-05-14
中国国家博物馆
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the titration method is cumbersome to operate, which is not conducive to the detection of large batches of samples, and has certain limitations for samples with low content; the color of the titration end point is not easy to distinguish, or if there is precipitation duri

Method used

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  • Method for simultaneously detecting various organic acid radicals and inorganic anions in harmful salt of cultural relics
  • Method for simultaneously detecting various organic acid radicals and inorganic anions in harmful salt of cultural relics
  • Method for simultaneously detecting various organic acid radicals and inorganic anions in harmful salt of cultural relics

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: a kind of method of simultaneously detecting multiple organic acid radicals and inorganic anions in the harmful salt of cultural relics, concrete steps are as follows:

[0030] (1) Prepare mixed acid standard stock solution (ρ=100ug / mL): accurately measure formate standard solution (ρ=1000ug / mL), acetate standard solution (ρ=1000ug / mL), propionate standard solution (ρ= 1000ug / mL), butyrate standard solution (ρ=1000ug / mL), and valerate standard solution (ρ=50000ug / mL) are measured in appropriate amounts, diluted with ultrapure water, and prepared to contain A, B, C, D, Mixed acid standard stock solutions with valerate concentrations of 100ug / mL, this solution should be prepared immediately before use;

[0031] (2) Accurately measure mixed acid standard stock solution and multi-element standard solution, mix them evenly, and dilute them with ultrapure water to prepare a series of standard working solutions with gradient concentrations of 5.0, 10.0, 15.0, 20....

Embodiment 2

[0052] Example 2: Testing the crystalline salt on the back of the "Hanyang Tianxia" tile

[0053] The crystalline salt on the back of the "Hanyang Tianxia" tile is bright white down-like crystals and light in weight; 0.0261g of solid was weighed, dissolved in ultrapure water, filtered with a 0.45um needle filter and transferred to a volumetric flask; An appropriate amount of water is used to dissolve the solids, and then filtered and transferred to the volumetric flask for three times; the solution in the volumetric flask is finally adjusted to 25ml to obtain a sample of the crystalline saline solution; the same chromatographic conditions as in Example 1 are used to detect the ultrapure crystalline saline solution sample and blank sample Water; in the present embodiment, the measured values ​​of the concentrations of various organic acid radicals and inorganic anions in the crystalline brine solution sample are shown in Table 3;

[0054] Table 3 Determination of the concentrat...

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Abstract

The invention relates to a method for simultaneously detecting various organic acid radicals and inorganic anions in harmful salt of cultural relics, and belongs to the technical field of preventive protection of cultural relics. The method comprises the following steps: preparing standard working solutions with gradient concentrations from five standard substances including formate, acetate, propionate, butyrate and valerate and a multi-element standard solution, and sequentially detecting the standard working solutions by adopting an ion chromatograph to obtain a chromatogram; drawing a standard curve and fitting a standard curve equation for the concentrations of the organic acid and the anions in the standard working solution according to the peak areas of different organic acid radicals and the anions; detecting the crystalline saline solution sample under the same chromatographic condition, and calculating the concentrations of the organic acid radicals and anions detected in the crystalline saline solution sample according to the standard curve equation; and calculating the mass fractions of the organic acid radicals and the anions in the crystalline salt according to the concentrations of the organic acid radicals and the anions detected in the crystalline salt aqueous solution sample. The method can be used for analyzing the types of environmental pollutants causing salt damage to cultural relics.

Description

technical field [0001] The invention relates to a method for simultaneously detecting multiple organic acid radicals and inorganic anions in harmful salts of cultural relics, and belongs to the technical field of preventive protection of cultural relics. [0002] technical background [0003] Salt damage is one of the most important causes of damage to immovable cultural relics (such as ancient cultural relics, stone cultural relics, murals, etc.) or movable cultural relics (such as metal cultural relics, ceramic cultural relics, etc.). [0004] Harmful salts that cause harm mainly include chloride salts, sulfates, and nitrates. Among them, Na 2 SO 4 It is widely considered to be the most destructive salt: it can cause diseases such as cracks in ruins, soil sandification, and soil powder; it can cause internal swelling and cracking of stone cultural relics, and pollute the external surface, destroying their integrity and ornamental value; It causes diseases such as herpes ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/96
CPCG01N30/02G01N30/96
Inventor 王倩倩丁莉石安美王建平铁付德唐铭刘薇王力之周靖程
Owner 中国国家博物馆
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