异戊酸
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液体石蜡中异戊酸HJ1262-2022
BW06013 | 10⁻⁵˙⁰w/w
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（母液)液体石蜡中异戊酸HJ1262-2022
BW06007 | 10⁻²˙⁰w/w
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异戊酸
BW1518-5ml | GC≥99%
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戊酸
BePure-26463 | 99.3%
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戊酸
BePure-26463-25mg | 99.3%
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异戊酸
1ST1786-1ml | 见证书
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异戊酸甲酯
1ST163369-1ml | 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.
Product Name
Isovaleric acid
Product Code
BW901074
Lot Number
23061548
CAS No.
503-74-2
Mol. Formula
C5H10O2
Mol. Weight
102.13
Certified on
13 Jun 2023
Expiry Date
12 Jun 2025
Storage Temp
20°C ± 4°C
Specification
0.5mL
CERTIFIED
Purity
CERTIFIED
Expanded Uncertainty (U)
Approved by
99.0%
0.5%
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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2. 样品需避光保存并在24 h内分析；
3. 色谱柱建议选用极性毛细管柱（如DB-WAX）。
以上信息仅供参考，请以相应标准的原文为准！