Uji aktivitas antioksidan sediaan teh celup kombinasi rimpang kapulaga amomum cardamomum dan akar alang alang imperata cylindrica dengan metode peredaman radikal DPPH = Antioxidant activity test of the tea bags preparation of cardamom rhizome amomum cardamomum and imperatae radix imperata cylindrica combination with DPPH free radical scavenging method