1、ASTM DI093 72 9 0759530 0533344 Tb2 41)Designation:D 3093-72(Reapproved 1992)Standard Test Method for Pickup Efficiency of Residual Aerosol Insecticides This standard is issued under the fixed designation D 3093:the number immediately following the designation indicates the year of original adoption
2、 or.in the case of revision.the year of last revision.A number in parentheses indicates the year of last reapproval.A superscnpt epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This test method covers the determination of the pickup efficiency of residual ae
3、rosol insecticides.1.2 The values stated in inch-pound units are to be regarded as the standard.The values given in parentheses are for information only.1.3 This standard does not purport to address all of the safety problems,if an!,associated with its use.It is the responsibilily of the user of thi
4、s srandard IO establish appro-priate safeti and health pradices and determine the applica-bilit)?o f regulatory limitarions prior to use.2.Summary of Test Method 2.1 In this test method a smooth,nonabsorbent target is used to represent an ordinary household application or residual insecticides to ba
5、seboard.cabinets.etc.Any very coarse particles that do not reach the target are also collected and weighed with the target deposit.2.2 The aerosol is directed from the test specimen con-tainer onto the target.Both the container and the target are weighed before and after spraying.and the target pick
6、up is calculated as a percentage of the mass of matenal sprayed.The percentage of low-volatile material in the aerosol formu-lation is also determined,so that the efficiency of deposition of the low-volatiles can be calculated.The percentage of the low-volatiles not deposited,multiplied by the conce
7、ntrations of active insecticidal ingredients,gives the potential toxic hazard of using the product.3.Significance and Use 3,i Although the efficiency of residual insecticide depends on particle size.this efficiency can be determined more easily by the percentage deposit than by the difficult determi
8、nation of the actual particle size.The corresponding important values for the residual insecticide aerosol are the percentage of the low-volatile ingredients that strike the target surface,and thus perform their function,and the percentage of the low-volatile ingredients that do not strike the targe
9、t surface and are wasted and may present a toxic hazard to the user.3.2 This test method permits varying the target distance for fuller study of special types of residual aerosols.A further feature is that it provides a means for eliminating the inaccuracies caused by solvents and propellents deposi
10、ting This test method is under the jurisdiction of ASTM Committee E-35 on Pesticides and is the direct responsibility of Subcommittee E35.12 on Insect Control Agents.This test method was originally developed by the Chemical Specialties Manufacturers Assn.Current edition approved July 28.1972.Publish
11、ed September 1972.FIG.1 Apparatus for Pickup Efficiency of Residual Aerosol Insecticide on the target,and by the variable amount of moisture condensed on the target by the spray.4.Apparatus(Fig.i)4.1 Box-,24 in.(609 mm)wide,20 in.(508 mm)high,and 10 in.(254 mm)deep,constructed of Y4-in.(6.4-mm)plywo
12、od on a simple frame.The front is hinged to the bottom and secured to the top with a cupboard latch.Four sets of three 1%.(25.4-mm)holes are drilled on lines of centers 2 in.(5 1 mm)from the tops and bottoms of the two sides of the box.The entire box is painted inside and out with a glossy enamel to
13、 make it easy to clean.The box protects the target from drafts and allows slow.steady evaporation of the target deposit.4.2 Paper Clamp,I-in.(25.4-mm).4.3 Blotting Paper,/I6 in.(1.6 mm)thick,cut into 12 by 4.4 Backstop.such as a square quartz bottle.3%in.(89 4.5 Presstire-Sensitive Tape.4.6 Balance,
14、small,tnple-beam,having a capacity of 11 1 g and a sensitivity of 0.01 g.The balance is modified by removing the pan and drilling a hole in the base directly under the pan hook.A corresponding hole is drilled in the top center of the box.The balance is bolted in position on 12%.(305 by 305-mm)square
15、s.mm)on a side.Fisher balance No.2-015 has been found satisfactop for this test method.18 NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.ASTM D3093 72 0759530 0533345 9T9 fim D3093 top o
16、f the box.An extra mass,approximately equal to the mass of the pan,may be required.If so,it is attached to the pan hook,and a wire passing through the holes in the base of the balance and top of the box is attached to the extra mass.A 1-in.(25.4-mm)paper clamp is attached to the wire approximately 14 in.(356 mm)above the bottom of the box.4.7 Balnce,having a capacity of 500 g and a sensitivity of 10 mg or less for weighing the test specimens.4.8 Target,constructed from a 12 by 12Y2-h.(305 by 3 1