Page:NIOSH Manual of Analytical Methods - 5030.pdf/1

 CYANURIC ACID

C3N3(OH3)

MW: 129.08

METHOD: 5030, Issue 2

5030

CAS: 108-80-5

RTECS: XZ1800000

EVALUATION: PARTIAL

OSHA : no standard NIOSH: no recommended exposure limit ACGIH: no TLV

PROPERTIES:

Issue 1: 15 May 1989 Issue 2: 15 August 1994

solid; d 2.50 g/mL @ 20 °C; MP >330 °C; (decomposes to cyanic acid); VP not significant

SYNONYMS: 2,4,6-trihydroxy-1,3,5-triazine; isocyanuric acid; 1,3,5-triazine-2,4,6(1 H,3H,5H)trione.

SAMPLING SAMPLER:

Filter (5-µm PVC membrane)

FLOW RATE:

1 to 3 L/min

VOL-MIN: -MAX:

10 L @ 0.1 mg/m 3 1000 L

SHIPMENT:

routine

SAMPLE STABILITY:

≥ 69 days at 25 °C [1]

FIELD BLANKS:

2 to 10 field blanks per set

MEASUREMENT TECHNIQUE:

HPLC, UV DETECTION

ANALYTE:

cyanuric acid

EXTRACTION:

3 mL 0.005 M Na 2HPO 4, 5:95 (v:v) methanol:water (pH = 7.0), 10 min ultrasonic

INJECTION VOLUME:

ACCURACY RANGE STUDIED:

not studied

BIAS:

not determined

15 µL

MOBILE PHASE:

0.005 M Na 2HPO 4, 5:95 (v:v) methanol:water (pH = 7.0)

COLUMN:

µ-Bondapak C 18, 10-µm particle, size; Radial PAK cartridge, 11 cm x 8-mm ID

DETECTOR:

UV, 225 nm

CALIBRATION:

standard solutions of cyanuric acid in mobile phase

RANGE:

1 to 750 µg per sample

ESTIMATED LOD: 0.3 µg per sample ˆ ): not determined OVERALL PRECISION (S rT PRECISION (Sr): ACCURACY:

0.020 @ 12 to 412 µg per sample [1]

not determined

APPLICABILITY: The working range is 0.01 to 10 mg/m 3 for a 100-L air sample.

INTERFERENCES: Trichloroisocyanuric acid interferes because it reacts with water (which is present in the eluent used for recovery) to form cyanuric acid.

OTHER METHODS: None identified for air analysis. HPLC method for measurement in solution is a variation of the method of Briggle et al. [2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94