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萘啶酸

BW905013

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389-08-2

100mg

秦境

99.9%

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萘啶酸介绍：

Reference Material

This certificate is designed in accordance with ISO17034 and ISO Guide 31. This reference material (RM) was designed,produced andverified in accordance with ISO/IEC 17025, ISO 17034 and a registered qualitymanagement system ISO9001.

Product Name	Nalidixic acid
Product Code	BW905013
Lot Number	23061536
CAS No.	389-08-2
Mol. Formula	C₁₂H₁₂N₂O₃
Mol. Weight	232.24
Certified on	2 Jun 2023
Expiry Date	1 Jun 2025
Storage Temp	20°C ± 4°C
Specification	100 mg

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

99.9%

0.5%

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 arebased on 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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本公司销售的所有产品仅供实验科研使用，不用于人体及临床诊断。

国家标准：食品安全国家标准动物性食品中萘啶酸残留量的测定液相色谱-串联质谱法

适用范围	适用于猪、牛、羊、鸡等动物肌肉、肝脏、肾脏及脂肪组织中萘啶酸残留量的测定。

核心检测方法

样品经乙腈提取，固相萃取柱净化，液相色谱-串联质谱法（LC-MS/MS）检测，外标法定量。

检出限与定量限

方法检出限（LOD）为0.5 μg/kg，定量限（LOQ）为1.0 μg/kg。

质控样品要求

空白样品加标回收率应为80%-120%，平行样品相对标准偏差（RSD）≤15%。

关键实验步骤

1. 样品均质后用乙腈震荡提取；
2. 提取液经C18固相萃取柱净化；
3. 氮吹浓缩后复溶进样；
4. LC-MS/MS条件：C18色谱柱，流动相为甲醇-0.1%甲酸水溶液。

特别说明	需注意基质效应对定量结果的影响，建议使用基质匹配标准曲线；实验过程中需避免使用塑料器皿，防止吸附损失。

行业标准：水质磺胺类和喹诺酮类抗生素的测定高效液相色谱法

适用范围	适用于地表水、地下水、生活污水和工业废水中萘啶酸等喹诺酮类抗生素的检测。

核心检测方法

水样经HLB固相萃取柱富集净化，采用高效液相色谱-荧光检测器（HPLC-FLD）分析，流动相为乙腈-磷酸盐缓冲溶液。

检出限与定量限

方法检出限为5.0 ng/L，定量限为20.0 ng/L。

质控样品要求

每批次样品需包含空白加标和基体加标，加标回收率应控制在70%-130%。

关键实验步骤

1. 水样过滤后调节pH至4.0；
2. 固相萃取柱活化后上样，依次用纯水和甲醇洗脱；
3. 洗脱液浓缩后进样分析。

特别说明	需注意水样保存条件（4℃避光保存且48小时内完成前处理）；流动相需现用现配以避免基线漂移。

以上信息仅供参考，请以相应标准的原文为准！