CN2258616Y

CN2258616Y - Simple iodine-investgating box

Info

Publication number: CN2258616Y
Application number: CN 95237256
Authority: CN
Inventors: 肖丹; 彭红雁; 李军; 唐志文; 俞汝勤
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 1995-07-24
Filing date: 1995-07-24
Publication date: 1997-07-30
Anticipated expiration: 2005-07-24

Abstract

The utility model relates to a simple iodine-investigating box (1), which is a tool for rapidly and simply measuring iodine content in iodine salts. Common chemical reagents (3), (4), a pen type iodine-investigating meter (2) made of an ion meter (2-2) with a display screen (2-22), and a novel iodine ion sensitive electrode (2-1) are arranged in the box. Using conventional chemical reagent calibrating method and ion meter measuring method can finish one-time test within less than 10 minutes. The simple iodine-investigating box has small volume, rapid speed and low cost, is conveniently capable of being loaded in a clothing pocket; the simple iodine-investigating box has positive action on performing Chinese government regulation of generalizing table salt fortified with iodine work.

Description

Simple and easy iodine measuring box

The utility model relates to testing tool, specifically refers to be exclusively used in the simple and easy iodine measuring box of measuring amount of iodine in the iodizedsalt.

5% the serious iodine deficiency of people is arranged in China's population according to statistics approximately, and this is serious problems that relate to several ten million populations, because iodine deficiency causes child development deviation, feeblemindedness has serious consequences to the whole society.Therefore the Chinese government has worked out relevant laws and regulations in order to improve quality of the people, is defined in the salt and must adds iodine by standard.Yet facts have proved that though the salt of selling on market is in fact really not so all titled with the title of salt compounded of iodine, some does not add iodine at all in salt, other iodine adding amounts do not meet state specified standards.Cause the reason of above-mentioned phenomenon to reap staggering profits except the lawless person, outside the deception people, also be owing to lack a kind of method that can measure the iodizedsalt amount of iodine fast, simply in the society on the other hand, cause the chance of mixing the spurious with the genuine therefore for the illegal salt dealer of minority, also how to differentiate that to law enfrocement official and dealer amount of iodine causes certain difficulty when stocking up.

The method of amount of iodine is to adopt volumetric method in the general measurement iodizedsalt of current China, promptly adds excessive reductant in quantitative iodizedsalt solution K103 is reduced, and carries out the content that iodine is measured in titrimetry with titrant then.These class methods are measured loaded down with trivial details time-consuming, need special laboratory and well-trained analysis operation personnel, can't realize portable, simple and easy and quick measurement.Iodine in the also useful iodine test paper method fast measuring iodizedsalt, but this method is a semiquantitative method, can't accurately measure the content of determination of iodine in iodized salt.Therefore, not only precision is not high for the obviously visible volumetric method that adopts at present, and is time-consuming expensive, measured at any time in the ten hundreds of salt circulation in particularly can't be in the whole society.

Therefore the utility model is at the situation that can't determine amount of iodine in present China iodizedsalt process of circulation, develops a kind of volume little (a complete set of instrument have only two bag cigarette cases big like that), and cost is low, quick, simple and easy and simple and easy iodine measuring box that precision is high.It not only can extensively be used for measuring the iodizedsalt amount of iodine by the aufsichtsrat, and can be used for measuring fast the amount of iodine that other contain iodine food.

Design proposal of the present utility model is a kind of novel pen type to be surveyed the iodine meter add necessary reagent bottle and standard reagent, be placed on and form the complete simple and easy iodine measuring box of a cover in the custom-designed box (or sack), mainly utilize the pen type of the iodide ion sensitive electrode that is equipped with in the iodine measuring box to survey iodine meter and common chemical reagent, with the amount of iodine of the reagent standardization of knowing in can the tested salt compounded of iodine of very fast acquisition.

Details are as follows in conjunction with the accompanying drawings for the utility model, wherein:

Fig. 1 is simple and easy iodine measuring box synoptic diagram;

Fig. 2 utilizes simple and easy iodine measuring box to measure the testing procedure of amount of iodine in the salt compounded of iodine.

Reference numeral:

1 easily-testing box, 2 pen types are surveyed the iodine meter

2-1 iodide ion sensitive electrode 2-2 ionometer

2-22 display screen 3 chemical reagent

4 chemical reagent, 5 standard reagent bags

The left side in the easily-testing box 1 is equipped with two bottles of chemical reagent 3 and 4 respectively as shown in Figure 1, and standard reagent bag 5 is equipped with in the centre; A pen type survey iodine meter 2 is equipped with on the right of easily-testing box 1, it is keys of the present utility model that this pen type is surveyed iodine meter 2, its lower end is an iodide ion sensitive electrode 2-1 (being commonly called as probe), ionometer 2-2 of connection on iodide ion sensitive electrode 2-1, the top of this ionometer is provided with a display screen 2-22 that can show the amount of iodine reading.Therefore when iodide ion sensitive electrode 2-1 inserted tested salt, the resulting signal of iodide ion sensitive electrode promptly obtained reflection in display screen, had directly read the amount of iodine of tested salt.Above-mentioned iodide ion sensitive electrode 2-1 utilizes 50%1: 1 mercuric sulphide HgS and mecrurous iodide Hg ₂I ₂Silver sulfide Ag with 50%1: 1 ₂The silver iodide AgI mixed crystal compressing tablet sensitive membrane of S replaces the sensitive membrane that was used for the PH meter originally.Above-mentioned chemical reagent 3 refers to any organic acid or mineral acid, and chemical reagent 4 refers to sodium sulphite and sodium thiosulfate reductive agent.5 li dresses of standard reagent bag be standard salt compounded of iodine reagent.

When utilizing the design's simple and easy iodine measuring box test salt compounded of iodine amount of iodine, its job step divides 5 to go on foot and carry out shown in Fig. 2:

I, proofread and correct the reading that pen type is surveyed the iodine meter with standard reagent routinely;

II, make tested salt compounded of iodine mother liquor, be diluted to 1: 3 aqueous solution behind the filtering mother liquor again with the water salt ratio of 20-80: 15-75;

III, in tested iodine salt water solution, insert pen type and survey the iodine meter and proofread and correct reading

The combination solution that IV, adding are made up of acid and sodium sulphite stopped after 1-2 minute,

V, display screen stable reading can be read the amount of iodine of tested salt compounded of iodine, and its degree of accuracy is ± 2PPm.

Simple and easy iodine measuring box volume described in the utility model is little, as use boxed only as 20 cigarettes box sizes of two bags, as it is then more convenient to be packed in bag, and design utmost point should cost is low, speed is fast, just can finish one-shot measurement in common every 5-10 minute, has therefore greatly improved amount of iodine is measured in the salt compounded of iodine feasibility and popularization, be extensive use of in not only can selling, supervising, and can also be used in reference to and lead the production that contains salt compounded of iodine.In addition, simple and easy iodine measuring box also can be used for other and contains amount of iodine in the iodine food except that the amount of iodine that is used for measuring salt compounded of iodine.

Claims

1, a kind of pen type that comprises is surveyed the iodine meter, chemical reagent, the simple and easy iodine measuring box that standard reagent is formed, above-mentioned chemical reagent has two kinds, a kind of is any organic acid or mineral acid (3), another kind is sodium sulphite and sodium thiosulfate reductive agent (4), feature of the present utility model, be that the left side is standard reagent bag (5) in the middle of two bottles of chemical reagent (3) and (4) are housed in easily-testing box (1), the right side is that pen type is surveyed iodine meter (2), and the lower end that this pen type is surveyed iodine meter (2) is to be an ionometer (2-2) that has display screen (2-22) above the iodide ion sensitive electrode (2-1).