本標(biāo)準(zhǔn)規(guī)定了高品質(zhì)片狀氫氧化鉀的分型、要求、試驗(yàn)方法、檢驗(yàn)規(guī)則、標(biāo)志、標(biāo)簽、包裝、運(yùn)輸、貯存和。

This standard specifies the classification, requirements, test methods, inspection rules, marks, labels, packaging, transportation, storage and safety of high-quality flake potassium hydroxide.

本標(biāo)準(zhǔn)適用于精制KCl經(jīng)離子膜法電解所得的高品質(zhì)片狀氫氧化鉀。該產(chǎn)品主要用于電池行業(yè)、洗滌劑和化妝品、歧化松香鉀皂和各種鉀鹽、醫(yī)藥中間體、合成橡膠、ABS樹(shù)脂和天然橡膠乳液、發(fā)酵、紙張分量劑、農(nóng)藥制造等。

This standard is applicable to high-quality flake potassium hydroxide obtained from refined KCl by ion-exchange membrane electrolysis. The product is mainly used in battery industry, detergent and cosmetics, disproportionated rosin potassium soap and various potassium salts, pharmaceutical intermediates, synthetic rubber, ABS resin and natural rubber lotion, fermentation, paper dosage agent, pesticide manufacturing, etc.

分子式和相對(duì)分子質(zhì)量

Molecular formula and relative molecular mass

分子式：KOH

Molecular formula: KOH

高品質(zhì)片狀氫氧化鉀分為以下三種類型。

High quality flake potassium hydroxide is divided into the following three types.

Ⅰ型：95%規(guī)格，氫氧化鉀含量為95%以上的產(chǎn)品。

Type I: products with 95% specification and more than 95% potassium hydroxide content.

Ⅱ型：90%規(guī)格，氫氧化鉀含量為90%以上、95%以下的產(chǎn)品。

Type II: products with 90% specification and potassium hydroxide content of more than 90% and less than 95%.

Ⅲ型：75%規(guī)格，氫氧化鉀含量為75%以上、90%以下的產(chǎn)品。

Type III: 75% specification, with potassium hydroxide content of more than 75% and less than 90%.

外觀：白色片狀。

Appearance: white flake.

試驗(yàn)方法

test method

氯化物含量的測(cè)定

Determination of chloride content

電位滴定法（仲裁法）

Potentiometric titration (arbitration method)

方法提要

Method summary

在酸性乙醇-水溶液中，以銀-硫化銀電極為測(cè)量電極，甘汞電極為參比電極，用硝酸銀標(biāo)準(zhǔn)滴定溶液滴定，借助于電位突躍確定其反應(yīng)終點(diǎn)。

In the acid ethanol water solution, the silver silver sulfide electrode was used as the measuring electrode and calomel electrode as the reference electrode. The end point of the reaction was determined by means of potential jump.

試劑

reagent

同GB/T3050-2000中的第4章。

The same as Chapter 4 of gb/t3050-2000.

儀器

instrument

同GB/T3050-2000中的第5章。

The same as Chapter 5 of gb/t3050-2000.

分析步驟

Analysis steps

移取10mL試驗(yàn)溶液A置于50mL燒杯中，加1滴溴酚藍(lán)指示液，用氫氧化鈉溶液或硝酸溶液調(diào)節(jié)溶液的pH值，使溶液恰呈黃色。加入1mLKCl標(biāo)準(zhǔn)溶液[c（KCl）=0.005mol/L]，再加入乙醇，使乙醇與試驗(yàn)溶液的體積比為3：1，總體積不大于40mL，以下按GB/T3050-2000中6.2“以下操作按4.6中……同時(shí)進(jìn)行空白試驗(yàn)”規(guī)定進(jìn)行操作。

Transfer 10ml of test solution a into a 50ml beaker, add 1 drop of bromophenol blue indicator solution, and adjust the pH value of the solution with sodium hydroxide solution or nitric acid solution to make the solution just yellow. Add 1ml of KCl standard solution [c (KCl) =0.005mol/l], and then add ethanol, so that the volume ratio of ethanol to test solution is 3:1, and the total volume is no more than 40ml. The following operations shall be carried out according to the provisions of 6.2 "blank test shall be carried out at the same time in 4.6" in gb/t3050-2000.

GB/T3050-2000無(wú)機(jī)化工產(chǎn)品中氯化物含量測(cè)定的通用方法電位滴定法

Gb/t3050-2000 inorganic chemical products - General method for determination of chloride content - Potentiometric Titration

結(jié)果計(jì)算

Result calculation

氯化物含量以氯（Cl）的質(zhì)量分?jǐn)?shù)ω3計(jì)，數(shù)值以%表示，按式（4）計(jì)算：

Chloride content is determined by the mass fraction of chlorine (CL) ω 3. The value is expressed in% and calculated according to formula (4):

式中：

Where:

V一一試驗(yàn)溶液消能硝酸銀標(biāo)準(zhǔn)滴定溶液的體積的數(shù)值，單位為毫升（mL）；

V -- volume of silver nitrate standard titration solution for energy dissipation of test solution, unit: ml;

V0一一空白試驗(yàn)溶液消耗硝酸銀標(biāo)準(zhǔn)滴定洛液的體積的數(shù)值，單位為毫升（mL）；

V0 -- volume of silver nitrate standard titration solution consumed by blank test solution, unit: ml;

c一一硝酸銀標(biāo)準(zhǔn)滴定溶液的濃度的準(zhǔn)確數(shù)值，單位為摩爾每升（mol/L）；

C -- accurate concentration of silver nitrate standard titration solution, unit: mol/l;

m一一試料質(zhì)量的數(shù)值，單位為克（g）；

M -- value of sample mass, in grams (g);

M一一氯（Cl）的摩爾質(zhì)量的數(shù)值，單位為克每摩爾（g/moL）（M=35.45）。

M -- the value of the molar mass of chlorine (CL), in grams per mole (g/mol) (m=35.45).

取平行測(cè)定結(jié)果的算術(shù)平均值為測(cè)定結(jié)果，兩次平行測(cè)定結(jié)果的差值為不大于0.0005%。

Take the arithmetic mean of the parallel determination results as the determination results, and the difference between the two parallel determination results shall not be greater than 0.0005%.

高品質(zhì)片狀氫氧化鉀-氯化物含量的測(cè)定的過(guò)程內(nèi)容便是如此了，您可以作為參考使用，當(dāng)然在實(shí)驗(yàn)過(guò)程中是要做好保障的，更多內(nèi)容就來(lái)關(guān)注我們網(wǎng)站m.wenping365.com吧！

This is the content of the process of determining the content of high-quality flake potassium hydroxide chloride. You can use it as a reference. Of course, safety should be guaranteed during the experiment. For more information, please pay attention to our website www.jinhao360 Com!