制藥用水TOC分析儀 純水總有機碳分析儀  紫外法

    紫外吸收光譜用于TOC的檢測分析最早可追溯到1972年,Dobbs等人對于254nm處紫外吸光度值(A)和城市污水處理二級出水及河水的TOC之間線性關系進行了研究。經過幾十年的發展,由于具有快速、不接觸測量、重復性好、維護量少等優點，該方法的應用得到飛速發展。

制藥用水TOC分析儀 純水總有機碳分析儀  差減法測定TOC值的方法原理

水樣分別被注入高溫燃燒管(900℃)和低溫反應管(150℃)中。經高溫燃燒管的水樣受高溫催化氧化，使有機化合物和無機碳酸鹽均轉化成為二氧化碳。經反應管的水樣受酸化而使無機碳酸鹽分解成為二氧化碳，其所生成的二氧化碳依次導入非分散紅外檢測器，從而分別測得水中的總碳(TC)和無機碳(IC)。總碳與無機碳之差值，即為總有機碳(TOC)。

Offline detection

During off-line detection, the instrument can directly sample from the sample bottle or other containers without pressure. Instrument pipeline flushing and instrument calibration shall be operated offline. If there are insoluble particles in the sample, it shall pass through the filter membrane (pore size 60 μ M U.M or less) to prevent particles in the sample from blocking the instrument. The sampling tube of the instrument is a 1 / 16 inch Teflon tube, and the flow rate of water sample pumped into the pipeline by the peristaltic pump is about 0.5 ml / min.

性能規格:

◆測量范圍：0.01mg/L～1.000 mg/L（此處可調）

◆精 度：?4%測試范圍

◆分 辨 率：0.001mg /L

◆分析時間：連續分析

◆響應時間：6分鐘之內

◆檢測極限：0.001mg /L

◆樣品溫度：1- 95℃

◆重復性誤差：≤ 3%

◆電源要求/功能：220V

◆顯 示 屏：彩色觸摸屏

◆操作控制：無線藍牙技術；

Environmental requirements

The instrument shall be operated in a constant temperature and humidity environment suitable for operation. Avoid direct sunlight and abnormal temperature; Too high temperature (over 104 ? F, 40 ? C) will lead to abnormal operation, and too low temperature (below 50 ? F, 10 ? C) will lead to excessive measurement error.

電阻法

該法是近年來開始應用的技術,其原理是在溫度補償前提下,測量樣品在紫外線氧化前后電阻率的差值來實現的。但該方法對被測量的水體來源要求比較苛刻,只能用相對潔凈的工業用水和純水,應用方向單一。

Carbon dioxide sensor

Two carbon dioxide sensors are installed on the instrument, which are composed of conductivity sensor and temperature sensor. The conductivity measurement adopts double precision technology, which can realize automatic calibration and temperature compensation. The tic sensor is used to detect the concentration of carbon dioxide in the non oxidized water sample and detect the conductivity value of the water sample; TC sensor is used to detect the sum of the carbon dioxide contained in the water sample itself and the carbon dioxide concentration generated by the decomposition of organic matter in the water sample.

使用與操作方法

開始檢測并計入檢測次數，檢測完畢后顯示最后一次檢測結果，其中幾次檢測的結果均自動保存在查詢記錄當中。檢測次數的設置方式為：用“選擇”鍵移動光標，用“設置”鍵修改數字，按“確定”鍵進行確認，進入分析界面。先進行四次沖洗過程

Analysis steps of TOC in water samples

1. Reagent preparation

(1) Potassium hydrogen phthalate (khc8h4o4): Reference Reagent

(2) Anhydrous sodium carbonate: Reference Reagent

(3) Sodium bicarbonate: Reference Reagent

(4) Carbon dioxide free distilled water

2. Preparation of standard stock solution

(1) Organic carbon standard stock solution: weigh an appropriate amount of khc8h4o4 after drying and dilute it with water. Generally, the concentration of stock solution is 400mg / L carbon.

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

總有機碳（TOC）分析儀是北京北廣精儀儀器設備有限公司獨立研制的專利產品，用于測定水樣中總有機碳的濃度，具有高靈敏度和精確度。

TOC分析儀可以檢測TOC濃度從0.001mg/L到1.000mg/L的水樣。本產品操作簡單，維護費用低，無需添加化學試劑，操作人員無需特殊培訓或專業化學知識。

3. Preparation of organic carbon and inorganic carbon standard solutions

Diluted from the respective stock solutions as required.

4. Drawing of calibration curve

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

二氧化碳測量循環

儀器每4分鐘檢測得出一個數據（包括TOC值和電導率值），在4分鐘的測量循環中TC和TIC是獨立檢測的。

5. Water sample determination

Take a proper amount of water sample and inject it into TOC instrument for determination. The peak height obtained can read the corresponding concentration from the standard curve, or the instrument can automatically calculate the result.

在線檢測裝置

進入儀器內部后水樣的流速大約為0.5 ml/min。進入在線檢測裝置的水樣溫度可以在1～95℃范圍內，儀器的廢液和在線檢測裝置的排出液均由排液管排出。

6. Calculation

Subtraction method: total organic carbon (mg / L) = total carbon - inorganic carbon

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

試劑準備

(1)鄰苯二甲酸氫鉀(KHC8H4O4)：基準試劑

(2)無水碳酸鈉：基準試劑

(3)碳酸氫鈉：基準試劑

(4)無二氧化碳蒸餾水

附件：

試驗主機一臺

采集管兩條

電源線一條

控制系統一套

數據采集系統一套

產品使用說明書一份

產品合格證、保修卡一份

折疊電導率檢測法

　　TOC電導率檢測技術能夠測量液態的CO2。業界采用的主要有兩種電導率檢測技術:一種是直接電導率法，另外一種是薄膜電導率檢測法(又稱選擇性電導率法)。采用兩種電導率法的TOC分析儀校驗結果都很穩定，檢測精度高。這兩種技術最主要的區別在于，直接電導率法比較容易受雜酸性，鹵化有機物等的干擾;而薄膜電導率檢測技術抗干擾性更佳。

　　薄膜電導率檢測法是GE TOC分析儀使用較多的檢測方法，TOC分析儀使用的膜能防止雜離子的通過，確保檢測的只是CO2的含量，從而使TOC的讀數更為精確。

　　公司秉承“顧客至上，銳意進取”的經營理念，堅持“客戶第一”的原則為廣大客戶提供優質的服務。歡迎惠顧!