反油酸
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標(biāo)準(zhǔn)物質(zhì)/土壤銨態(tài)氮,、有效磷,、速效鉀混合溶液（NY/T1848)
BW02635 | 不同濃度
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四氯乙烯中苯溶液標(biāo)準(zhǔn)物質(zhì)（紅外測(cè)油儀用）(適用:HJ637-2018水質(zhì)石油類(lèi)和動(dòng)植物油類(lèi)的測(cè)定-紅外分光光度法5.11)
BW04949 | 1000μg/mL
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標(biāo)樣/四氯乙烯中石油類(lèi)標(biāo)樣
BW02219d | 7.5mg/L左右
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標(biāo)準(zhǔn)物質(zhì)/總氮標(biāo)準(zhǔn)溶液/以N計(jì)
BW02285 | 20μg/mL
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標(biāo)準(zhǔn)物質(zhì)/總氮標(biāo)準(zhǔn)溶液/以N計(jì)
BW02643 | 45μg/mL
反油酸
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
Elaidic acid
Product Code
BW904002
Lot Number
23061523
CAS No.
112-79-8
Mol. Formula
C18H34O2
Mol. Weight
282.46
Certified on
2 Jun 2023
Expiry Date
1 Jun 2025
Storage Temp
4°C ± 4°C
Specification
100 mg
CERTIFIED
Purity
CERTIFIED
Expanded Uncertainty (U)
Approved by
99.4%
0.5%
The certified value(s) and uncertainty(ies) aredetermined in accordance with ISO 17034 with an 95% confidence level (k=2). Uncertaintyis based on the Total Combined Uncertainty, including uncertainties ofcharacterisation, homogeneity and stability testing. Stability values are basedon 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.