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尿苷5-单磷酸_58-97-9
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尿苷5-单磷酸

BW905002 {{goodObj.price > 0 ? '¥' + goodObj.price : '咨询'}} ¥{{goodObj.sell_price || 0}} 咨询 58-97-9 100mg {{goodObj.date}} 秦境 {{item.norm}} 99.8% {{inventory}}
尿苷5-单磷酸介绍:

Uncertainty

The certified value(s) and uncertainty(ies) aredetermined in accordance with ISO 17034 with an 95% confidence level (k=2).Uncertainty is based on the Total Combined Uncertainty, including uncertaintiesof characterisation, homogeneity and stability testing. Stability values are basedon real evidence opposed to simulation.

The producer certifies that this reference materialmeets the specification stated in this certificate until the expiry date,provided it is stored unopened at the recommended temperature herein. Productwarranties for this reference material are set out in the terms and conditionsof purchase.

Intended Use

This RM is intended for use in a laboratory as acalibration and quality control standard or in method development foranalytical techniques.

Safety

Proper precautions should be observed whilehandling. See Safety Data Sheet.

Traceability

The balances used for gravimetric measurements arecalibrated with weights traceable to the national standards (DKD). Thecalibration of the balances is verified daily internally and annually by anexternal7 accredited calibration service. Chromatographic methods are traceableto the International System of Units (SI).

Homogeneity

Random replicate samples of the final packaged RMhave been analysed to prove homogeneity compliant with ISO 17034.

Storage

The RM should be stored in the original sealedcontainer at the indicated temperature.

Instructions for use

It is recommended to use 1 mg as the minimum samplesize and if less material is used, to increase the certified uncertainty by afactor of two for half sample and four for a quarter of sample. If storageafter opening is necessary, the RM should be tightly closed and kept from lightand moisture. If the RM was in a sealed ampoule, it should be transferred to avial with minimum head space.


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国家标准:GB 5009.XXX-20XX 食品中核苷酸类物质的测定
标准名称及标准号 GB 5009.XXX-20XX 《食品中核苷酸类物质的测定 高效液相色谱法》
适用范围 适用于食品(如婴幼儿配方食品、保健食品等)中尿苷5-单磷酸及其他核苷酸类物质的定量分析。
核心检测方法 高效液相色谱法(HPLC),采用反相C18色谱柱,紫外检测器波长设置为254 nm,流动相为磷酸盐缓冲液-甲醇梯度洗脱。
检出限与定量限 尿苷5-单磷酸的检出限(LOD)为0.1 mg/kg,定量限(LOQ)为0.3 mg/kg。
质控样品要求 需包含空白样品、加标样品和平行样品。加标回收率应控制在85%-115%,相对标准偏差(RSD)≤10%。
关键实验步骤 1. 样品前处理:水提取或酶解后离心过滤;
2. 色谱条件优化:流速1.0 mL/min,柱温30℃;
3. 定量分析:外标法定量。
特别说明 需注意尿苷5-单磷酸在酸性条件下的稳定性,避免高温长时间处理;标准溶液需临用现配并避光保存。

以上信息仅供参考,请以相应标准的原文为准!