N-甲基苯胺
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乙醇中N-甲基苯胺溶液标准物质
BW04689 | 1000μg/mL
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乙醇中N-甲基苯胺溶液标准物质
BW04690 | 100μg/mL
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N-甲基苯胺标准品
RN-03322HYU | 0.99
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苯
H17542A-10mL | GCS
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苯
H17542-500ml | HPLC
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苯
1ST001098-1ml | 见证书
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苯胺
1ST1225-1ml | 见证书
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乙腈中三唑磷标准品
NCS1601335-100B2 | 100ug/mL
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水中2'-岩藻糖基乳糖（2'-FL）溶液
NCSG1603380-10000C | 10mg/mL
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水中乳糖-N-新四糖（LNnT）溶液
NCSG1603385-3000C | 3000μg/mL
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水中昆布三糖溶液
NCSG1603694-2000C | 2000ug/mL
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二氯甲烷甲醇中MK-9溶液
NCS1603698-500A | 0.5mg/mL
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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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。
GB/T 5750.8-2023《生活饮用水标准检验方法 第8部分：有机物指标》
适用于生活饮用水及其水源水中N-甲基苯胺等含氮有机物的检测，涵盖水样采集、前处理及仪器分析全流程。
气相色谱-质谱联用法（GC-MS）：样品经液液萃取后进样，以特征离子峰（m/z 106）定性，外标法定量。
检出限（LOD）：0.05 μg/L；定量限（LOQ）：0.15 μg/L，需满足信噪比≥3（LOD）和≥10（LOQ）。
每批次样品需包含空白样、平行样及加标回收样，加标量应为待测物浓度的0.5-2倍，回收率需控制在80%-120%。
1. 水样pH调节至碱性（pH≥11），使用二氯甲烷萃取；
2. 萃取液经脱水、浓缩后定容至1.0 mL；
3. GC-MS参数：DB-5MS毛细管柱，程序升温（初始60℃保持2min，以10℃/min升至280℃）。
1. 实验全程需避光操作，避免N-甲基苯胺光解；
2. 若使用其他等效色谱柱（如HP-5），需通过保留时间和质谱图验证定性结果；
3. 高浓度样品需稀释后复测，防止质谱检测器饱和。
以上信息仅供参考，请以相应标准的原文为准！