Table 2. Effect of the ratio of MRES to SDS on the particle properties of lambda-cyhalothrin nanosuspensions. ^a .

Ratio of MRES b to SDS c	Mean size (nm) ± S.D.	D90 d (nm) ± S.D.	PDI e ± S.D. f
1:3	39.3 ± 0.4	230.7 ± 32.3	0.44 ± 0.02
1:1	29.7 ± 0.2	146.7 ± 17.0	0.41 ± 0.01
3:1	16.2 ± 0.1	57.8 ± 5.9	0.29 ± 0.01

^aThe nanosuspensions containing 5% (w/w) lambda-cyhalothrin and 0.25% (w/w) surfactants were prepared at a shearing speed of 10000 rpm and 80°C.

^bMRES: maleic rosin-polyoxypropylene-polyoxyethylene ether sulfonate.

^cSDS: 1-dodecanesulfonic acid sodium salt.

^dD90: particle size expressed by the 90% diameter percentile.

^ePDI: polydispersity index.

^fS.D.: standard deviation of three measurements.