Leu-Enkephalin purified peptide can be used for calibration of mass spectrometers. Leu-Enkephalin peptide mass standard gives a monoisotopic mass of 556.277 [M + H]+ and average mass of 556.6 [M + H]+. Dissolve the Leu-Enkephalin peptide with buffer or matrixsolution right in the tube then analyze by MALDI-MS or ESI-MS. Molecular Weight: 555.6Monoisotopic Mass [M+H]+: 556.277Amino Acid Sequence: Tyr-Gly-Gly-Phe-Leu

UltraPure MALDI矩阵ProteoChem生产超纯基质辅助激光解吸电离质谱（MALDI-MS）基质产品。ProteoChem的UltraPure MALDI-MS基质通过一种专有方法进行纯化，该方法旨在通过去除可能干扰质谱分析的污染物来产生具有更高灵敏度，更高分辨率和更高信噪比的MALDI质谱图。ProteoChem的MALDI矩阵专用于分析蛋白质和多肽。ProteoChem的MALDI基质具有市场上最高的纯度。这些产品通常在98-100％的高范围内。