供应

纯水总有机碳（TOC）分析仪   水样中TOC的分析步骤

水中的有机物质的含量，以有机物中的主要元素一碳的量来表示，称为总有机碳。TOC的测定类似于TOD的测定。在950℃的高温下，使水样中的有机物气化燃烧，生成CO2，通过红外线分析仪，测定其生成的CO2之量，即可知总有机碳量。

纯水总有机碳（TOC）分析仪   水中TOC的监测

我们的生活离不开水，若相当多的有机污染物存在于水中，将直接影响水体的质量，对我们的生活和生产造成危害，因此水和废水的监测，越来越引起人们的重视。其中水体中总有机碳(TOC)含量的检测，日益引起关注。它是以碳含量表示水体中有机物质总量的综合指标。TOC的测定一般采用燃烧法，此法能将水样中有机物全部氧化，可以很直接地用来表示有机物的总量。因而它被作为评价水体中有机物污染程度的一项重要参考指标。

测定原理

总有机碳（TOC），由专门的仪器——总有机碳分析仪（以下简称TOC分析仪）来测定。TOC分析仪，是将水溶液中的总有机碳氧化为二氧化碳，并且测定其含量。利用二氧化碳与总有机碳之间碳含量的对应关系，从而对水溶液中总有机碳进行定量测定。

市面上常见的TOC分析仪都有两大基本功能：第一，首先将水中的总有机碳充分氧化，生成二氧化碳CO2；第二，测试新产生的CO2.不同品牌和型号的TOC分析仪的区别在于实现这两大基本功能的方法不同。常用的氧化技术有：燃烧氧化法、紫外线氧化法以及超临界氧化法；而对CO2的检测方法又分：非分散红外线检测，直接电导率检测以及选择性薄膜电导率检测。

紫外线氧化法

使用UV灯照射待测水样，水会分解成羟基和氢基，羟基和氧化物结合会生成CO2和水，然后检测新生成的CO2即可计算出总有机碳含量。在使用紫外线氧化法时，通过添加二氧化钛，过硫酸盐等可以提高氧化能力。紫外线氧化法的优点是氧化效率高，保养简单，缺点是UV灯管需要定期更换。

应用范围

该仪器可用于检测制药工业中纯化水、注射用水和去离子水中有机碳的浓度；也可用于半导体行业中超纯水TOC的检测。

在制药领域和生物化学领域清洁验证过程中，可用于验证清洁效果。

该仪器具有在线检测功能，可以在线监测制药工业的制水系统、半导体工业的超纯水制备系统和晶片工艺过程、电厂去离子水制备过程等。

主要特征:

1、高精度、高灵敏度，操作简单。

2、人性化操作界面，有一键运行功能，自动管路清洗功能。

3、高性能CPU，触摸屏设计，超大640*480点阵真彩显示器。

4、不用拆开机箱更换UV灯和泵管。

5、检测上限可设定，自动上限报警功能。

6、具有RS232数据接口，历史数据可存储6个月。

7、离线检测和在线检测可选配。

8、具有打印功能

水样中TOC的分析步骤

1.试剂准备

(1)邻苯二甲酸氢钾(KHC8H4O4)：基准试剂

(2)无水碳酸钠：基准试剂

(3)碳酸氢钠：基准试剂

(4)无二氧化碳蒸馏水

2.标准贮备液的制备

(1)有机碳标准贮备液：称取干燥后的适量KHC8H4O4，用水稀释，一般贮备液的浓度为400mg/L碳。

(2)无机碳标准贮备液：称取干燥后适量比例的碳酸钠和碳酸氢钠，用水稀释，一般贮备液的浓度为400mg/L无机碳。

3.有机碳、无机碳标准溶液的配制

从各自的贮备液中按要求稀释得来。

4.校准曲线的绘制

由标准溶液逐级稀释成不同浓度的有机碳、无机碳标准系列溶液，分别注入燃烧管和反应管，测量记录仪上的吸收峰高，与对应的浓度作图，绘制校准曲线。

5.水样测定

取适量水样注入TOC仪器进行测定，所得峰高从标准曲线上可读出相应的浓度，或由仪器自动计算出结果。

6.计算

差减法：总有机碳(mg/L)=总碳-无机碳

直接法：总有机碳(mg/L)=总碳

总有机碳（TOC）分析仪可用于检测制药工业中纯化水、注射用水和去离子水中总有机碳的浓度；可以在线监测制药工业的制水系统、半导体工业的超纯水制备系统和晶片工艺过程、电厂去离子水制备过程等，也可用于电厂、科研单位、实验室等超纯水TOC的检测。

产品特点

1.仪器采用便携设计，使用轻便，方便移动至取样点。

2.采用嵌入式系统，触摸屏设计，纯中文操作方便简易。

3.针对制药用水（TOC含量在1000ppb以下）总有机碳含量的检测设计，进行检测。

4.配备大量的储存空间，能够存储大量的测试数据。

5.中文打印，输出测试参数、测试结果。

6.在使用、贮存和更换过程中不需要气体或试剂，无移动部件，减少维修和维护成本。

7.当测试样品浓度超过规定限度，仪器能够自动报警，并输出控制信号。

8.符合国家2010版《中国药典》规定的测试方案，可以提供IQ/OQ/PQ服务。

性能规格:

测量范围：0.001mg/L～1.0mg/L（传感器可定制，浓度可调节最达到1000mg/L，根据式样要求传感器定制调节到某一段浓度范围）

精度：?4%测试范围

分辨率：0.001mg /L

分析时间：连续分析

响应时间：4分钟之内

检测极限：0.001mg /L

样品温度：1- 95℃

重复性误差：≤3%

电源要求/功能：220V

显示屏：彩色触摸屏

主要特征:

★高精度、高灵敏度，操作简单。

★人性化操作界面，有一键运行功能，自动管路清洗功能。

★高性能CPU，触摸屏设计，超大640*480点阵真彩显示器。

★不用拆开机箱更换UV灯和泵管。

★检测上限可设定，自动上限报警功能。

★具有RS232数据接口，历史数据可存储6个月。

★离线检测和在线检测可选配。

★具有打印功能

应用

目前，卫生防疫和水质监测部门越来越重视水中有机物的污染情况。TOC的检测必不可少，各种类型的TOC分析仪在这些部门也得到了比较广泛的应用。

TOC分析仪是一种常用于化学、生物和环境科学研究中的实验仪器。它是采用燃烧、氧化或还原等物理或化学反应，将样品中的有机物转化为三氧化碳和水，并通过测量二氧化碳生成量或消耗量来确定样品中的有机碳含量。TOC分析仪具有分析速度快、准确度高、操作简便等优点，因此在许多实验室中被广泛应用。

TOC分析仪的原理基于样品中有机物的氧化。当样品通过TOC分析仪时，它首先会经过一个燃烧室，在此处有机物会被完全氧化成二氧化碳和水。产生的二氧化碳被转移到另一个室内，这个室内含有一个传感器，可以测量二氧化碳的浓度。通过测量二氧化碳的生成量或消耗量，可以计算出样品中的有机物含量。

Analysis steps of TOC in water samples

The content of organic matter in water, expressed as the amount of the main element carbon in organic matter, is called total organic carbon. The determination of TOC is similar to the determination of TOD. At a high temperature of 950℃, the organic matter in the water sample is gasified and burned to generate CO2. The total organic carbon content can be determined by measuring the amount of CO2 generated using an infrared analyzer.

Monitoring of TOC in water

Our lives cannot do without water. If a considerable amount of organic pollutants exist in water, it will directly affect the quality of the water and pose a threat to our lives and production. Therefore, monitoring water and wastewater is increasingly attracting people's attention. The detection of total organic carbon (TOC) content in water bodies is increasingly attracting attention. It is a comprehensive indicator that represents the total amount of organic matter in water bodies based on carbon content. The determination of TOC generally adopts the combustion method, which can completely oxidize the organic matter in the water sample and can be directly used to indicate the total amount of organic matter. Therefore, it is regarded as an important reference indicator for evaluating the degree of organic pollution in water bodies.

Measurement principle

Total Organic Carbon (TOC) is measured by a specialized instrument called Total Organic Carbon Analyzer (TOC Analyzer). TOC analyzer is used to oxidize total organic carbon in aqueous solution to carbon dioxide and determine its content. Quantitative determination of total organic carbon in aqueous solution by utilizing the corresponding relationship between carbon content of carbon dioxide and total organic carbon.

The common TOC analyzers on the market have two basic functions: firstly, to fully oxidize the total organic carbon in water and generate carbon dioxide (CO2); Secondly, testing the newly generated CO2. The difference between TOC analyzers of different brands and models lies in the different methods used to implement these two basic functions. The commonly used oxidation techniques include combustion oxidation, ultraviolet oxidation, and supercritical oxidation; The detection methods for CO2 are divided into non dispersive infrared detection, direct conductivity detection, and selective thin film conductivity detection.

UV oxidation method

Using a UV lamp to irradiate the water sample to be tested, the water will decompose into hydroxyl and hydrogen groups. The combination of hydroxyl and oxide will generate CO2 and water, and then the newly generated CO2 can be detected to calculate the total organic carbon content. When using ultraviolet oxidation method, the oxidation ability can be improved by adding titanium dioxide, persulfate, etc. The advantages of UV oxidation method are high oxidation efficiency and simple maintenance, but the disadvantage is that UV lamps need to be replaced regularly.

Application scope

This instrument can be used to detect the concentration of organic carbon in purified water, injection water, and deionized water in the pharmaceutical industry; It can also be used for the detection of TOC in ultrapure water in the semiconductor industry.

In the pharmaceutical and biochemical fields, it can be used to verify the cleaning effect during the cleaning validation process.

This instrument has online detection function, which can monitor the water production system in the pharmaceutical industry, the ultrapure water preparation system and chip process in the semiconductor industry, and the deionized water preparation process in power plants online.

Main features:

1. High precision, high sensitivity, and easy operation.

2. Humanized operation interface, with one click operation function and automatic pipeline cleaning function.

3. High performance CPU, touch screen design, ultra large 640 * 480 dot matrix true color display.

4. No need to open the chassis to replace the UV lamp and pump tube.

5. The detection upper limit can be set, and the automatic upper limit alarm function.

6. Equipped with RS232 data interface, historical data can be stored for 6 months.

7. Offline detection and online detection are optional.

8. Equipped with printing function

Analysis steps of TOC in water samples

1. Preparation of reagents

(1) Potassium hydrogen phthalate (KHC8H4O4): reference reagent

(2) Anhydrous sodium carbonate: reference reagent

(3) Sodium bicarbonate: reference reagent

(4) CO2 free distilled water

2. Preparation of standard storage solution

(1) Organic carbon standard storage solution: Weigh an appropriate amount of dried KHC8H4O4 and dilute it with water. The concentration of the standard storage solution is generally 400mg/L carbon.

(2) Inorganic carbon standard storage solution: Weigh an appropriate proportion of sodium carbonate and sodium bicarbonate after drying, dilute with water, and the general concentration of the storage solution is 400mg/L inorganic carbon.

3. Preparation of organic carbon and inorganic carbon standard solutions

Dilute according to the requirements from their respective stock solutions.

4. Drawing of calibration curve

Dilute the standard solution step by step into different concentrations of organic carbon and inorganic carbon standard series solutions, inject them into the combustion tube and reaction tube respectively, measure the absorption peak height on the recorder, plot it against the corresponding concentration, and draw the calibration curve.

5. Water sample determination

Take an appropriate amount of water sample and inject it into the TOC instrument for measurement. The peak height obtained can be read from the standard curve to determine the corresponding concentration, or the instrument can automatically calculate the result.

6. Calculation

Subtraction method: Total organic carbon (mg/L)=Total carbon - Inorganic carbon

Direct method: Total organic carbon (mg/L)=Total carbon

The Total Organic Carbon (TOC) analyzer can be used to detect the concentration of total organic carbon in purified water, injection water, and deionized water in the pharmaceutical industry; It can be used for online monitoring of water production systems in the pharmaceutical industry, ultra pure water preparation systems and chip processes in the semiconductor industry, and deionized water preparation processes in power plants. It can also be used for TOC detection in ultra pure water in power plants, scientific research institutions, laboratories, etc.

Product Features

1. The instrument adopts a portable design, which is easy to use and convenient to move to the sampling point.

2. Adopting an embedded system and touch screen design, pure Chinese operation is convenient and easy.

3. Design and conduct testing for the total organic carbon content of pharmaceutical water (TOC content below 1000ppb).

4. Equipped with a large amount of storage space, capable of storing a large amount of test data.

5. Print in Chinese and output test parameters and results.

6. No gas or reagents are required during use, storage, and replacement, and there are no moving parts, reducing maintenance and repair costs.

When the concentration of the test sample exceeds the specified limit, the instrument can automatically sound an alarm and output a control signal.

8. According to the testing plan specified in the 2010 edition of the Chinese Pharmacopoeia, IQ/OQ/PQ services can be provided.

Performance specifications:

Measurement range: 0.001mg/L~1.0mg/L (The sensor can be customized, and the concentration can be adjusted up to 1000mg/L. The sensor can be customized and adjusted to a certain concentration range according to the style requirements)

Accuracy:?4% Test range

Resolution: 0.001mg/L

Analysis time: continuous analysis

Response time: within 4 minutes

Detection limit: 0.001mg/L

Sample temperature: 1-95℃

Repetitive error:≤3%

Power requirement/function: 220V

Display screen: Color touch screen

Main features:

★High precision, high sensitivity, easy operation.

★Humanized operation interface, with one click operation function and automatic pipeline cleaning function.

★High performance CPU, touch screen design, large 640 * 480 dot matrix true color display.

★No need to open the chassis to replace the UV lamp and pump tube.

★The detection upper limit can be set, and there is an automatic upper limit alarm function.

★Equipped with RS232 data interface, historical data can be stored for 6 months.

★Offline detection and online detection are optional.

★With printing function

application

At present, the health and epidemic prevention and water quality monitoring departments are paying increasing attention to the pollution of organic matter in water. The detection of TOC is essential, and various types of TOC analyzers have also been widely used in these departments.

TOC analyzer is an experimental instrument commonly used in chemical, biological, and environmental science research. It uses physical or chemical reactions such as combustion, oxidation, or reduction to convert organic matter in the sample into carbon trioxide and water, and determines the organic carbon content in the sample by measuring the amount of carbon dioxide generated or consumed. TOC analyzer has the advantages of fast analysis speed, high accuracy, and easy operation, so it is widely used in many laboratories.

The principle of TOC analyzer is based on the oxidation of organic compounds in the sample. When the sample passes through a TOC analyzer, it first passes through a combustion chamber where organic matter is completely oxidized into carbon dioxide and water. The generated carbon dioxide is transferred to another room, which contains a sensor that can measure the concentration of carbon dioxide. By measuring the generation or consumption of carbon dioxide, the organic content in the sample can be calculated.