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丙酸

BW901101

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79-09-4

500mg

秦境

99.5%

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丙酸介绍：

REFERENCE MATERIAL CERTIFICATE

Reference Material

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

Product Name	Propionic acid
Product Code	BW901101
Lot Number	25101515
CAS No.	79-09-4
Mol. Formula	C₃H₆O₂
Mol. Weight	74.08
Certified on	27 Oct. 2025
Expiry Date	26 Oct. 2030
Storage Temp	20°C ± 3°C
Specification	500mg

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

99.5%

1.0%

Uncertainty

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

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

Intended Use

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

Safety

Proper precautions should be observed while handling. See Safety Data Sheet.

Traceability

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

Homogeneity

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

Storage

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

Instructions for use

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

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国家标准解读：《食品安全国家标准食品中丙酸的测定》

标准名称及标准号

《食品安全国家标准食品中丙酸的测定》（GB 5009.120-2016）

适用范围	本标准适用于食品（如糕点、面包、酱油等）中丙酸的测定。适用于食品中丙酸的定量分析，不适用于含乳成分的食品。

核心检测方法

采用气相色谱法（GC）：样品经酸化处理后提取丙酸，经甲酯化衍生，通过气相色谱仪分离并定量检测。

检出限与定量限

检出限（LOD）为2.0 mg/kg，定量限（LOQ）为5.0 mg/kg。需根据仪器灵敏度及基质干扰进行验证。

质控样品要求

每批次样品需设置空白试验和加标回收试验。加标回收率应在80%-120%之间，RSD应小于10%。

关键实验步骤

1. 样品酸化后用水蒸气蒸馏提取丙酸；
2. 提取液经硫酸酸化、甲酯化衍生；
3. 使用气相色谱仪（配备FID检测器）进行检测；
4. 标准曲线法定量，需至少5个浓度梯度。

特别说明	实验中需注意：甲酯化过程需严格避光操作；气相色谱柱建议使用极性色谱柱（如HP-FFAP）；基质复杂的样品需增加净化步骤。

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以上信息仅供参考，请以相应标准的原文为准！