Nowadays, some people have doubts about the ability of washing
machine and laundry machine to remove impurities (najīs)
because the use of these machines has never been discussed by
fuqahā’ in the past. Therefore, this study is aimed at identifying
the existence of impurities after washing according to the method
of purification of Shāfi‘i’s madhhab. Three samples of blood,
urine and baby stool were used on the clothes. All samples were
tested using two methods - the Kestle-Meyer Test (KM-Test) and
Forensic DNA Profile Analysis at the Penang State Department
of Chemistry Forensic Lab. The results of the KM-Test test on
blood samples have shown negative results. While urine samples
and baby stools cannot be detected directly. In addition, the DNA
profile analysis also showed similar results that before washing,
the presence of najis in blood control samples was detected only
at 44.80 ng / μl (sample A) and 65. 00 ng / μl (sample B) and
after washing, the effect on samples A and B in the laundry wash
were only 1.78 ng / μl and 3.28 ng / μl. While in the washing
machine, there were only 3.28 ng / µl in sample A and 1.11 ng /
µl in sample B. Furthermore, this study concluded that washing
machine and laundry machine successfully remove the impurities
from clothing