KB mixed indicator standard powder

The invention relates to a KB mixed indicator standard powder, which is prepared from the following components in parts by weight: 1 to 10 parts of acid chrome blue K, 1 to 15 parts of naphthol green, and 50 to 60 parts of filling agent. The provided KB mixed indicator standard powder has the advantages that the color development is clear and the color change is sensitive; in the titration end point, the color changes from red to pure blue, the observation is clear, and the accuracy is effectively improved. A filling agent is added into the KB mixed indicator standard powder, the stability of the KB indicator is improved, the effective storage time is prolonged, and the KB mixed indicator standard powder can be stably stored for one to two years. 本发明涉及种KB混合指示剂标准粉，组分及重量份数如下：酸性铬兰K1-10、萘酚绿B1-15、填充剂50-60。本发明提供的KB混合指示剂标准粉的显色清楚、变色敏锐，由红色变为纯兰色终点观察准确，有效提高了准确度。本发明提供的KB混合指示剂标准粉加入了填充剂，提高了KB指示剂的稳定性，延长了有效储存时间，般可稳定1-2年。