CARA PERHITUNGAN JPT

CARA PERHITUNGAN JPT1. Lihat langsung dari tabelPengenceran 1010,1mlKombinasi2/33/30/3JPT/ 100 ml = 29

1010,1ml0/32/31/3JPT/ 100 ml = 9,32. Bila kombinasi data tidak ada di tabel Rumus ThomasJPT/ 100 ml =

Contoh:1010,1mlPenegasan3/52/51/5JPT/ 100 ml =

=

=16,6 JPT/100 ml (PEMBULATAN 1 ANGKA BELAKANG KOMA) Contoh1010,1mlPenegasan0/11/31/3JPT/100 ml =

== 15,7

3. Seri pengenceran desimal beda dgn seri pengenceran pada tabelContoh:a.10,10,01 gramPenegasan3/33/31/3JPT = lihat tabel 2

b.10,10,01 gramPenegasan2/32/30/3JPT/ gram = ...........

4. Bila >3 seri pengenceran desimal, maka digunakan hanya 3 dataSyarat:Dipilih pengenceran tertinggi yang memberikan hasil (+) pada seluruh tabung yang diperiksaPengenceran sebelumnya tidak boleh ada data yang negatifContoh10,10,010,001 0,0001 gram3/33/32/31/30/33/32/31/3JPT = (tabel 2)

Contoh10,10,010,001 0,0001 gram3/32/30/30/30/33/32/30/3JPT = 9,3/ gram (tabel 3)

10,10,010,001 0,0001 gram3/33/32/31/31/33/32/32/3JPT = (tabel 2)

Contoh10,10,010,001 0,0001 gram3/32/30/31/30/33/32/31/3JPT = 15/ gram (tabel 3)

10,10,010,001 ml0/31/30/30/30/31/30/3

Contoh Soal1010,1mlT. Perkiraan3/33/33/3T. Penegasan3/33/32/3T. Pelengkap3/33/32/3Hitung JPT/ 100 ml !Kombinasi = 3-3-2JPT/100 ml = 110010,10,010,001 gram0/31/30/30/3Hitung JPT/ gram!Kombinasi = 0-1-0

10,10,010,0010,0001 ml0/55/51/51/50/50/5Hitunglah JPT/ 10 ml!

Kombinasi = 0-5-2JPT=

=

50,50,050,005 ml2/32/33/30/3Hitung JPT/ ml! Kombinasi = 2-2-3

JPT = 0,8 /ml

50,50,050,005 0,0005 gram4/55/50/51/50/5Hitung JPT/ 10 gram!Kombinasi : 4-5-1

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