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丙烯酰胺_79-06-1
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丙烯酰胺

BW903047 {{goodObj.price > 0 ? '￥' + goodObj.price : '咨詢'}} ￥{{goodObj.sell_price || 0}} 咨詢 79-06-1 100mg {{goodObj.date}} 秦境 {{item.norm}} 99.1% {{inventory}}
丙烯酰胺介紹：

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.

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 external7 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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標(biāo)準(zhǔn)名稱及標(biāo)準(zhǔn)號(hào)
GB/T 5009.204-2016《食品安全國(guó)家標(biāo)準(zhǔn) 食品中丙烯酰胺的測(cè)定》
適用范圍
適用于食品（如薯類、谷物、咖啡等熱加工食品）中丙烯酰胺的檢測(cè)，涵蓋氣相色譜-質(zhì)譜法（GC-MS）和液相色譜-串聯(lián)質(zhì)譜法（LC-MS/MS）。
核心檢測(cè)方法
1. 樣品經(jīng)水提取、離心凈化后，采用同位素內(nèi)標(biāo)法進(jìn)行衍生化處理；
2. GC-MS或LC-MS/MS檢測(cè)，通過特征離子定量分析。
檢出限與定量限
1. GC-MS法：檢出限5 μg/kg，定量限10 μg/kg；
2. LC-MS/MS法：檢出限3 μg/kg，定量限5 μg/kg。
質(zhì)控樣品要求
1. 每批次樣品需包含空白對(duì)照和加標(biāo)回收實(shí)驗(yàn)；
2. 加標(biāo)濃度應(yīng)覆蓋實(shí)際樣品濃度范圍，回收率需滿足70%-120%；
3. 平行樣數(shù)量≥10%，相對(duì)偏差≤15%。
關(guān)鍵實(shí)驗(yàn)步驟
1. 樣品粉碎后低溫避光保存；
2. 水提取時(shí)控制溫度≤40℃，防止丙烯酰胺分解；
3. 衍生化反應(yīng)需嚴(yán)格控溫（70±2℃）和避光；
4. 儀器分析前需進(jìn)行基質(zhì)匹配校準(zhǔn)。
特別說明
1. 丙烯酰胺易光解，實(shí)驗(yàn)全程需避光操作；
2. 前處理過程中禁用強(qiáng)酸強(qiáng)堿環(huán)境；
3. 若使用不同型號(hào)質(zhì)譜儀，需重新驗(yàn)證方法參數(shù)。

以上信息僅供參考，請(qǐng)以相應(yīng)標(biāo)準(zhǔn)的原文為準(zhǔn)！
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