If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf
推荐产品
产品名称
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), 50/30µm DVB/CAR/PDMS, StableFlex (1 cm), needle size 23 ga, Autosampler, pk of 3, plain gray hub
物料
StableFlex fiber
plain gray hub
针尺寸
23 ga
包装
pk of 3
环保替代产品特性
Waste Prevention
Safer Solvents and Auxiliaries
Learn more about the Principles of Green Chemistry.
sustainability
Greener Alternative Product
df
30 μm (CAR/PDMS layer)
50 μm (DVB layer)
技术
solid phase microextraction (SPME): suitable
光纤长度
1 cm
基质活性基团
50/30µm DVB/CAR/PDMS
DVB/CAR/PDMS coating
应用
food and beverages
相容性
Autosampler
for analyte group flavors (volatiles and semivolatiles, C3-20) (MW 40-275)
环保替代产品分类
, Aligned
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相关类别
一般描述
应用
特点和优势
其他说明
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商品
The work describes the development of an HS-SPME-GC-MS method to determine 2-chloroethanol as a marker of fumigant ethylene oxide in different kinds of sesame seed samples.
The work describes the development of an HS-SPME-GC-MS method to determine 2-chloroethanol as a marker of fumigant ethylene oxide in different kinds of sesame seed samples.
The work describes the development of an HS-SPME-GC-MS method to determine 2-chloroethanol as a marker of fumigant ethylene oxide in different kinds of sesame seed samples.
The work describes the development of an HS-SPME-GC-MS method to determine 2-chloroethanol as a marker of fumigant ethylene oxide in different kinds of sesame seed samples.
实验方案
In this article, SPME-GC was successfully used to identify many volatile compounds present in the headspace over several spirits.
GC Analysis of Terpenes in Cannabis on Equity®-1 after Headspace SPME using 50/30 μm DVB/CAR/PDMS Fiber
SPME offers efficient sample preparation for analyzing terpene/terpenoid profiles in plant essential oils using automation.
SPME offers efficient sample preparation for analyzing terpene/terpenoid profiles in plant essential oils using automation.
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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Which gauge is larger, 23 or 24?
1 answer-
The gauge designation and actual size of needles follow an inverse relationship. Therefore, a 24 gauge needle is smaller than a 23 gauge needle. Needle gauge sizes also apply to the SPME needle used for sampling. While the original SPME fibers were manufactured with 24 gauge needles, it is highly recommended to use 23 gauge needles for all applications that involve an autosampler. The 23 gauge needles are well-suited for use with the Merlin Microseal septum system and other septum-less seals. However, it is advisable to avoid using 23 gauge needles with standard silicone septa, as they may cause coring of the septum.
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