ktdave
You’ll get better accuracy if you do two 1:100 serial dilutions of your sample (still gives 1:10,000 dilution).
If you can measure 100mls, do your dilutions this way:
Measure 100mls of water and place in a cup.
Using your 1ml syringe, remove 1 ml of water
Add 1ml of your 10% Bleach solution and mix well.
This is your first 1:100 dilution
To another cup, add 100mls of water.
Using your 1ml syringe, remove 1 ml of water
Add 1ml of your 1:100 dilution solution from the above step and mix well.
You now have your 1:10,000 dilution needed for your test