Properties:
| Related Categories | Analytical/Chromatography, Portable Field Samplers, Sample Preparation & Purification, Solid Phase Microextraction (SPME) |
| packaging | pack of 2 |
| df | 75 μm |
| matrix active group |
Carboxen/Polydimethylsilo |
Description:
General description
Concentrate and Store Analytes from Water; Sample Indoor Air - The SPME portable field sampler is an efficient and economical way of extracting and transporting volatile and semivolatile compounds from field samples. Extracted compounds storage losses for pesticides extracted and stored using a portable field sampler were significantly lower than losses from stored whole water samples. The sampler can be reused 50-100 times, and is disposed of when the fiber is no longer usable.
The portable field sampler also efficiently detects organic compounds in air. In our studies, the sampler allowed us to monitor typical HPLC and GC solvents at ppb levels in laboratory air. Four fibers are available: a polydimethylsiloxane
(PDMS)/Carboxen fiber for trace levels of volatiles, a general purpose PDMS fiber, a PDMS/DVB fiber for semi-volatiles and larger volatiles, and a Carbowax/DVB fiber for polar semivolatiles.
Five slots in the needle guide/depth gauge control the depth of needle insertion into a sample container, or into the injection port during fiber desorption.
Assemblies contain 24 gauge needles. 23 gauge needles and other coatings may be available as customs.
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D,K2SO4Na2CO3BaCL2NaNO3
请问有什么方法检测细胞内活性氧更好，各位有什么经验，及相关试剂盒推荐一下。
（1）优级纯试剂 亦称保证试剂，为一级品，纯度高，杂质极少，主要用于精密分析和科学研究，常以GR表示。
（2）分析纯试剂 亦称分析试剂，为二级品，纯度略低于优级纯，杂质含量略高于优级纯，适用于重要分析和一般性研究工作，常以AR表示。
（3）化学纯试剂 为三级品，纯度较分析纯差，但高于实验试剂，适用于工厂、学校一般性的分析工作，常以CP表示。
（4）实验试剂 为四级品，纯度比化学纯差，但比工业品纯度高，主要用于一般化学实验，不能用于分析工作，常以 LR表示。
以上按试剂纯度的分类法已在我国通用。根据化学工业部颁布的“化学试剂包装及标志”的规定，化学试剂的不同等级分别用各种不同的颜色来标志，见表1。
表1 我国化学试剂的等级及标志
通过解答，教会我，谢谢
C.MgCl2溶液和氨水D.盐酸和NaAlO2溶液
为什么
请问下有无同学需要H37RA的？我是做EAE模型的，上个月购买了BDDifco公司的H37RA（货号），因为购买的时候只能整盒6支购买，但我们用不了那么多，所以想问问有无同学需要的，100mg/支，800元/支或用等价试剂交换。地址广州。有需要的请私信，谢谢！
A、Na2CO3HClH2SO4NaNO3
B、K2CO3H2SO4HNO3BaCl2
C、HClHNO3AgNO3NaCl
D、NaOHFeCl3MgCl2BaCl2
A.H2SO4Na2SO4AgNO3BaCl2.
B.NaOHNa2CO3NaHSO4MgCl2
C.CaCl2NaNO3MgSO4BaCl2
D.HNO3KOHKClK2CO3
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