借助知识库这一工具,您可以找到常见问题的答案。在下面浏览所有知识库文章。
借助知识库这一工具,您可以找到常见问题的答案。在下面浏览所有知识库文章。
Why do extracted samples and quality controls have lower signal compared to neat standards? When a sample or a spiked quality control is extracted, the signal is usually lower than that of the corresponding standard made in pure solvents.
10/18/2023
Mass Spectrometers
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Standards and Reagents
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Certificates of analysis (CoA) are available for various reagents; however for proteases such as trypsin and beta galactosidase that are sold by SCIEX, no CoA is available.
10/05/2023
Standards and Reagents
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To Prevent Contamination, Use Formic Acid Ampules To prevent your samples from becoming contaminated, use formic acid from small volume ampules rather from a large bottle. Impurities can accrue when taking aliquots of formic acid multiple times from the same bottle, and these impurities can impact positive ion analysis especially.
12/28/2018
Standards and Reagents
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What Are the Peptide Sequences in the Six-Peptide Mixture (PN 4465940)? The six-peptide mixture (part number 4465940) is used for the calibration of mass spectrometers. The kit contains the following six peptides and their mono-isotopic masses: bradykinin (2-9 clip) (904.4681), angiotensin I (1296.6853), glu1-fibrinopeptide (1570.6774), ACTH (1-17 clip) (2093.0867), ACTH (18-39 clip) (2465.1989), and ACTH (7-38 clip) (3657.9294).
12/26/2018
Academia Omics
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Pharma CRO
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Standards and Reagents
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Which Amino Acids in the PepCalMix Are Labeled? The PepCal Mix (P/N 5045759) contains 20 heavy-labeled peptides, with the heavy isotopes incorporated in the amino acids, K and R.
10/09/2018
Academia Omics
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Pharma CRO
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Standards and Reagents
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Where Can I Find Instructions for the Protein Preparation Kit? Protein preparation instructions can be found on the SCIEX website at https://sciex.com/Documents/tech%20notes/Protein-Preparation-Kit-Protocol.pdf or https://sciex.com/products/standards-and-reagents/automated-protein-digestion-solution.
07/09/2018
Academia Omics
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Pharma CRO
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Standards and Reagents
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Where Can I find Safety Data Sheets (MSDS) or Certificates of Analysis (CoA)? To find the Safety Data Sheets and Certificate of Analysis for Sciex reagents, navigate to https://sciex.com/tech-regulatory?safetyTerm=4406127&safetyLanguage=English-United+States
12/11/2017
Standards and Reagents
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Acetic Acid Is Needed To Prepare the PepCalMix Peptides in the SWATH® Acquisition Performance Kit This article describes the experimental issues when formic acid is used to prepare the PepCalMix for the SWATH® Acquisition Performance Kit instead of 5% acetic acid.
11/09/2017
Academia Omics
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Pharma CRO
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Standards and Reagents
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