SUPER ABSORBENT POLYMERS
MW: Varies
CAS: See Table 1
METHOD: 5035, Issue 1
5035
RTECS: None
EVALUATION: PARTIAL
OSHA : no PEL NIOSH: no REL ACGIH: no TLV
Issue 1: 15 August 1994
PROPERTIES: solids; hygroscopic; form gels with water [1]
SYNONYMS: sodium polyacrylate, Sanwet IM-3500 (sodium polyacrylate grafted with starch), Water Lock A-100 (sodium acrylate-acrylamide copolymer grafted with starch), Water Lock B-204 (potassium acrylate-acrylamide copolymer grafted wi th starch), Water Lock G-400 (sodium acrylate-acrylamide copolymer). SAMPLING
MEASUREMENT
SAMPLER:
MEMBRANE FILTER (PVC, 5-µm, 37-mm)
FLOW RATE:
1 to 3 L/min
VOL-MIN: -MAX:
50 L 1500 L
SHIPMENT:
routine
ASHING REAGENTS:
SAMPLE STABILITY:
>8 months @ 25 °C [2]
WAVELENGTH:
324. 7 nm
BLANKS:
2 to 10 field blanks per set
CALIBRATION:
super absorbent polymer in sucrose
RANGES:
see Table 1
BULK SAMPLES: required (20 g)
ACCURACY 3
RANGE STUDIED:
0.02 to 0.15 mg/m for Sanwet IM-3500
BIAS:
not significant
TECHNIQUE:
ICP-AES OR AAS
ANALYTE:
copper
EXTRACTION:
6 mL of 0.07 M cupric acetate; 14 mL of water; ultrasonic bath, 15 min.
70% HNO 3, 10 mL; 70% HClO 4, 1 mL (optional)
ESTIMATED LODs:
see Table 1
PRECISION (Sr):
0.086 [2]
ˆ rT): not determined OVERALL PRECISION (S ACCURACY:
not determined
APPLICABILITY: This method has been used to measure Sanwet IM-3500 in air at a diaper manufacturing plant [2].
INTERFERENCES: Aerosols of copper compounds would interfere; however, this problem is uncommon.
OTHER METHODS: Super absorbent polymers in air can be determined by collection on PVC filters, treatment with hot HCl and measurement of sodium by flame AAS [2].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
