LOQ should be determined when the quantitative determination for impurities and degradation products are developed. 杂质和降解产物用定量测定方法研究时,应确定定量限。
The degraded product which has excellent inhibition effect on microorganisms was prepared from black wattle tannin by chemical degraded modification. 通过对黑荆树皮单宁化学降解改性,制备了具有优良抑菌性能的降解产物。