“WH”反应板是由公安部从美国进口的供基层单位做法医物证种属试验以确证人血的器材，系由美国医药公司生产，以一步法作大便潜血检查之用。此反应板所使用的试剂以及检验的原理不甚明了，故本文对此板检验人血的特异性及其灵敏度作了实验观察，现报告如下：一、实验材料（1） The “WH” plate is a device imported by the Ministry of Public Security from the United States for use by a grass-roots unit as a forensic medical evidence test to confirm human blood. It is produced by the U.S. pharmaceutical company and used for one-step fecal occult blood test. The reagent used in the reaction plate and the principle of the test are not clear, so this paper tests the specificity and sensitivity of human blood to make an experimental observation, which is reported as follows: First, the experimental materials (1)