K2026123计算溶液所需的质量、体积或浓度。
为什么选择此级别
，适用于对基线干扰要求严格的色谱和分析工作流程。
储存与运输
室温。常规运输 。请查阅批次 COA 获取详细规格。
质量文档
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
文献证明
在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
概述
本溶液标准物质主要用于在化学需氧量（Mn 法）测量中，校准仪器或进行分析过程的质量控制及方法评价等。
一、样品制备
本溶液标准物质采用葡萄糖纯品为原料，以无有机物质的三次纯化水（电渗透、离子交换、石英器蒸馏）为溶剂，在室温为 20℃±2℃的洁净室中采用重量法进行配制。批量制备后分装于20ml安瓿瓶，并进行高温高压灭菌。
二、溯源性及定值方法
本标准物质采用高锰酸钾容量法确定其量值。该标准物质的量值可通过选用的高锰酸钾溶液标准物质和 S117539草酸钠纯度标准物质，溯源到保存于中国计量科学研究院的基准试剂纯度国家基准。通过使用满足计量学特性要求的测量方法和计量器具，保证标准物质量值的溯源性。
三、特性量值及不确定度
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不确定度评定中考虑了测量重复性、称量、终点判断、高锰酸钾溶液标准物质、草酸钠溶液标准物质、均匀性和稳定性引入的不确定度分量。
四、均匀性检验及稳定性考察
按照 JJF1343-2012《标准物质定值的通用原则及统计学原理》要求，采用高锰酸钾容量法，按随机取样规则选取样品进行均匀性检验，用 F 检验法判定样品是均匀的。采用相同测量方法，本着先密后疏的原则，定期随机抽取样品进行稳定性考察，证明样品是稳定的。本标准物质自定值日期起，有效期 1 年。研制单位将继续跟踪监测该标准物质的稳定性，有效期内如发现量值变化，将及时通知用户。
五、包装、储存及使用
该标准物质以玻璃安瓿封装，每支 20mL，需在避光、阴凉、干燥处保存。使用前于室温（20±5℃）平衡，并摇动均匀，用洁净移液管从安瓿中准确移取 10mL 于 1L 容量瓶中（稀释到 1/100 使用）用纯水定容，本标准物质提供稀释前的浓度标准值。水浴温度应保持 100℃沸腾状态。 样品在沸水浴中加热时，盖上表面皿。在酸性条件下滴定时，草酸钠和高锰酸钾的反应温度应保持（60~80）℃。应同时做空白实验。
product description
The standard material of this solution is mainly used in the measurement of chemical oxygen demand (Mn method), to calibrate the instrument or to perform the quality control and method evaluation of the analytical process.
1. Sample preparation
The standard substance of this solution uses pure glucose as the raw material, and uses three-time purified water (electro-osmosis, ion exchange, and quartz distillation) without organic substances as the solvent, and is prepared by gravimetric method in a clean room with a room temperature of 20℃±2℃ . After batch preparation, it is divided into 20ml ampoules and subjected to high temperature and high pressure sterilization.
2. Traceability and valuation method
This standard substance uses the potassium permanganate volumetric method to determine its value. The quantity value of this standard substance can be traced to the national standard of purity of standard reagents stored in the Chinese Academy of Metrology through the selected potassium permanganate solution standard substance and S117539 sodium oxalate purity standard substance. Through the use of measuring methods and measuring instruments that meet the requirements of metrological characteristics, the traceability of the quality value of the standard material is guaranteed.
3. Characteristic value and uncertainty
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In the uncertainty evaluation, the uncertainty components introduced by measurement repeatability, weighing, endpoint judgment, potassium permanganate solution standard material, sodium oxalate solution standard material, uniformity and stability are considered.
4. Uniformity inspection and stability inspection
In accordance with the requirements of JJF1343-2012 "General Principles and Statistical Principles for the Valuation of Reference Materials", the potassium permanganate volumetric method is used, and samples are selected for uniformity inspection according to random sampling rules, and the F test method is used to determine that the samples are uniform. Using the same measurement method, in line with the principle of dense first and sparse later, samples are randomly sampled regularly for stability inspections to prove that the samples are stable. This standard substance has a validity period of 1 year from the date of value determination. The development unit will continue to track and monitor the stability of the reference material, and if any changes in the value are found within the validity period, the user will be notified in time.
5. packaging, storage and use
The standard substance is packaged in glass ampoules, each 20mL, and should be stored in a dark, cool and dry place. Before use, equilibrate at room temperature (20±5°C) and shake it evenly. Use a clean pipette to accurately pipette 10mL from the ampoule and place it in a 1L volumetric flask (diluted to 1/100 for use) with pure water. This standard substance Provide the concentration standard value before dilution. The temperature of the water bath should be kept at a boiling state of 100°C. When the sample is heated in a boiling water bath, cover with a watch glass. When titrating under acidic conditions, the reaction temperature of sodium oxalate and potassium permanganate should be maintained at (60~80)℃. A blank experiment should be done at the same time.
规格
规格或纯度
237mg/L in water
英文名称
COD Calibration Standard
储存条件
室温
运输条件
常规运输
名称和识别符
分子类型
小分子
技术文档
常见问题
本产品应如何储存？
请于室温条件下保存。
本产品如何运输？
本产品按常温标准条件运输，无需温控包装。
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